diff --git a/src/db/rdb/base/configs.go b/src/db/rdb/base/configs.go
new file mode 100644
index 0000000..ba63783
--- /dev/null
+++ b/src/db/rdb/base/configs.go
@@ -0,0 +1,94 @@
+package base
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+
+	"github.com/ihexxa/quickshare/src/db"
+)
+
+func (st *BaseStore) getCfg(ctx context.Context, tx *sql.Tx) (*db.SiteConfig, error) {
+	var configStr string
+	err := tx.QueryRowContext(
+		ctx,
+		`select config
+		from t_config
+		where id=0`,
+	).Scan(&configStr)
+	if err != nil {
+		return nil, err
+	}
+
+	config := &db.SiteConfig{}
+	err = json.Unmarshal([]byte(configStr), config)
+	if err != nil {
+		return nil, err
+	}
+
+	if err = db.CheckSiteCfg(config, true); err != nil {
+		return nil, err
+	}
+	return config, nil
+}
+
+func (st *BaseStore) setCfg(ctx context.Context, tx *sql.Tx, cfg *db.SiteConfig) error {
+	if err := db.CheckSiteCfg(cfg, false); err != nil {
+		return err
+	}
+
+	cfgBytes, err := json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_config
+		set config=?
+		where id=0`,
+		string(cfgBytes),
+	)
+	return err
+}
+
+func (st *BaseStore) SetClientCfg(ctx context.Context, cfg *db.ClientConfig) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	siteCfg, err := st.getCfg(ctx, tx)
+	if err != nil {
+		return err
+	}
+	siteCfg.ClientCfg = cfg
+
+	err = st.setCfg(ctx, tx, siteCfg)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) GetCfg(ctx context.Context) (*db.SiteConfig, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	siteConfig, err := st.getCfg(ctx, tx)
+	if err != nil {
+		return nil, err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+
+	return siteConfig, nil
+}
diff --git a/src/db/rdb/base/files.go b/src/db/rdb/base/files.go
new file mode 100644
index 0000000..13b289c
--- /dev/null
+++ b/src/db/rdb/base/files.go
@@ -0,0 +1,326 @@
+package base
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"path"
+	"strings"
+
+	"github.com/ihexxa/quickshare/src/db"
+)
+
+func (st *BaseStore) getFileInfo(ctx context.Context, tx *sql.Tx, itemPath string) (*db.FileInfo, error) {
+	var infoStr string
+	fInfo := &db.FileInfo{}
+	var id uint64
+	var isDir bool
+	var size int64
+	var shareId string
+	err := tx.QueryRowContext(
+		ctx,
+		`select id, is_dir, size, share_id, info
+		from t_file_info
+		where path=?`,
+		itemPath,
+	).Scan(
+		&id,
+		&isDir,
+		&size,
+		&shareId,
+		&infoStr,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, db.ErrFileInfoNotFound
+		}
+		return nil, err
+	}
+
+	err = json.Unmarshal([]byte(infoStr), &fInfo)
+	if err != nil {
+		return nil, err
+	}
+	fInfo.Id = id
+	fInfo.IsDir = isDir
+	fInfo.Size = size
+	fInfo.ShareID = shareId
+	fInfo.Shared = shareId != ""
+	return fInfo, nil
+}
+
+func (st *BaseStore) GetFileInfo(ctx context.Context, itemPath string) (*db.FileInfo, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	info, err := st.getFileInfo(ctx, tx, itemPath)
+	if err != nil {
+		return nil, err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return info, err
+}
+
+func (st *BaseStore) ListFileInfos(ctx context.Context, itemPaths []string) (map[string]*db.FileInfo, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	// TODO: add pagination
+	placeholders := []string{}
+	values := []any{}
+	for i := 0; i < len(itemPaths); i++ {
+		placeholders = append(placeholders, "?")
+		values = append(values, itemPaths[i])
+	}
+	rows, err := tx.QueryContext(
+		ctx,
+		fmt.Sprintf(
+			`select id, path, is_dir, size, share_id, info
+			from t_file_info
+			where path in (%s)
+			`,
+			strings.Join(placeholders, ","),
+		),
+		values...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var fInfoStr, itemPath, shareId string
+	var isDir bool
+	var size int64
+	var id uint64
+	fInfos := map[string]*db.FileInfo{}
+	for rows.Next() {
+		fInfo := &db.FileInfo{}
+
+		err = rows.Scan(&id, &itemPath, &isDir, &size, &shareId, &fInfoStr)
+		if err != nil {
+			return nil, err
+		}
+
+		err = json.Unmarshal([]byte(fInfoStr), fInfo)
+		if err != nil {
+			return nil, err
+		}
+		fInfo.Id = id
+		fInfo.IsDir = isDir
+		fInfo.Size = size
+		fInfo.ShareID = shareId
+		fInfo.Shared = shareId != ""
+		fInfos[itemPath] = fInfo
+	}
+	if rows.Err() != nil {
+		return nil, rows.Err()
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return fInfos, nil
+}
+
+func (st *BaseStore) addFileInfo(ctx context.Context, tx *sql.Tx, infoId, userId uint64, itemPath string, info *db.FileInfo) error {
+	infoStr, err := json.Marshal(info)
+	if err != nil {
+		return err
+	}
+
+	location, err := getLocation(itemPath)
+	if err != nil {
+		return err
+	}
+
+	dirPath, itemName := path.Split(itemPath)
+	_, err = tx.ExecContext(
+		ctx,
+		`insert into t_file_info (
+			id, path, user, location, parent, name,
+			is_dir, size, share_id, info
+		)
+		values (
+			?, ?, ?, ?, ?, ?,
+			?, ?, ?, ?
+		)`,
+		infoId, itemPath, userId, location, dirPath, itemName,
+		info.IsDir, info.Size, info.ShareID, infoStr,
+	)
+	return err
+}
+
+func (st *BaseStore) AddFileInfo(ctx context.Context, infoId, userId uint64, itemPath string, info *db.FileInfo) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	err = st.addFileInfo(ctx, tx, infoId, userId, itemPath, info)
+	if err != nil {
+		return err
+	}
+
+	// increase used space
+	err = st.setUsed(ctx, tx, userId, true, info.Size)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) delFileInfo(ctx context.Context, tx *sql.Tx, itemPath string) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`delete from t_file_info
+		where path=?
+		`,
+		itemPath,
+	)
+	return err
+}
+
+func (st *BaseStore) SetSha1(ctx context.Context, itemPath, sign string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	info, err := st.getFileInfo(ctx, tx, itemPath)
+	if err != nil {
+		return err
+	}
+	info.Sha1 = sign
+
+	infoStr, err := json.Marshal(info)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_file_info
+		set info=?
+		where path=?`,
+		infoStr,
+		itemPath,
+	)
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+func (st *BaseStore) DelFileInfo(ctx context.Context, userID uint64, itemPath string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	// get all children and size
+	rows, err := tx.QueryContext(
+		ctx,
+		`select path, size
+		from t_file_info
+		where path = ? or path like ?
+		`,
+		itemPath,
+		fmt.Sprintf("%s/%%", itemPath),
+	)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	var childrenPath string
+	var itemSize int64
+	placeholders := []string{}
+	values := []any{}
+	decrSize := int64(0)
+	for rows.Next() {
+		err = rows.Scan(&childrenPath, &itemSize)
+		if err != nil {
+			return err
+		}
+		placeholders = append(placeholders, "?")
+		values = append(values, childrenPath)
+		decrSize += itemSize
+	}
+
+	// decrease used space
+	err = st.setUsed(ctx, tx, userID, false, decrSize)
+	if err != nil {
+		return err
+	}
+
+	// delete file info entries
+	_, err = tx.ExecContext(
+		ctx,
+		fmt.Sprintf(
+			`delete from t_file_info
+			where path in (%s)`,
+			strings.Join(placeholders, ","),
+		),
+		values...,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) MoveFileInfo(ctx context.Context, userId uint64, oldPath, newPath string, isDir bool) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	info, err := st.getFileInfo(ctx, tx, oldPath)
+	if err != nil {
+		if errors.Is(err, db.ErrFileInfoNotFound) {
+			// info for file does not exist so no need to move it
+			// e.g. folder info is not created before
+			// TODO: but sometimes it could be a bug
+			return nil
+		}
+		return err
+	}
+	err = st.delFileInfo(ctx, tx, oldPath)
+	if err != nil {
+		return err
+	}
+	err = st.addFileInfo(ctx, tx, info.Id, userId, newPath, info)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func getLocation(itemPath string) (string, error) {
+	// location is taken from item path
+	itemPathParts := strings.Split(itemPath, "/")
+	if len(itemPathParts) == 0 {
+		return "", fmt.Errorf("invalid item path '%s'", itemPath)
+	}
+	return itemPathParts[0], nil
+}
diff --git a/src/db/rdb/base/files_sharings.go b/src/db/rdb/base/files_sharings.go
new file mode 100644
index 0000000..1b56853
--- /dev/null
+++ b/src/db/rdb/base/files_sharings.go
@@ -0,0 +1,219 @@
+package base
+
+import (
+	"context"
+	"crypto/sha1"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"path"
+	"time"
+
+	"github.com/ihexxa/quickshare/src/db"
+)
+
+func (st *BaseStore) generateShareID(payload string) (string, error) {
+	if len(payload) == 0 {
+		return "", db.ErrEmpty
+	}
+
+	msg := fmt.Sprintf("%s-%d", payload, time.Now().Unix())
+	h := sha1.New()
+	_, err := io.WriteString(h, msg)
+	if err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%x", h.Sum(nil))[:7], nil
+}
+
+func (st *BaseStore) IsSharing(ctx context.Context, dirPath string) (bool, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return false, err
+	}
+	defer tx.Rollback()
+
+	var shareId string
+	err = tx.QueryRowContext(
+		ctx,
+		`select share_id
+		from t_file_info
+		where path=?`,
+		dirPath,
+	).Scan(
+		&shareId,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return false, db.ErrFileInfoNotFound
+		}
+		return false, err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return false, err
+	}
+	return shareId != "", nil
+}
+
+func (st *BaseStore) GetSharingDir(ctx context.Context, hashID string) (string, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return "", err
+	}
+	defer tx.Rollback()
+
+	var sharedPath string
+	err = tx.QueryRowContext(
+		ctx,
+		`select path
+		from t_file_info
+		where share_id=?
+		`,
+		hashID,
+	).Scan(
+		&sharedPath,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return "", db.ErrSharingNotFound
+		}
+		return "", err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return "", err
+	}
+	return sharedPath, nil
+}
+
+func (st *BaseStore) AddSharing(ctx context.Context, infoId, userId uint64, dirPath string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	shareID, err := st.generateShareID(dirPath)
+	if err != nil {
+		return err
+	}
+
+	location, err := getLocation(dirPath)
+	if err != nil {
+		return err
+	}
+
+	_, err = st.getFileInfo(ctx, tx, dirPath)
+	if err != nil && !errors.Is(err, db.ErrFileInfoNotFound) {
+		return err
+	}
+
+	if errors.Is(err, db.ErrFileInfoNotFound) {
+		// insert new
+		parentPath, name := path.Split(dirPath)
+		info := &db.FileInfo{Shared: true} // TODO: deprecate shared in info
+		infoStr, err := json.Marshal(info)
+		if err != nil {
+			return err
+		}
+
+		_, err = tx.ExecContext(
+			ctx,
+			`insert into t_file_info (
+				id, path, user,
+				location, parent, name,
+				is_dir, size, share_id, info
+			)
+			values (
+				?, ?, ?,
+				?, ?, ?,
+				?, ?, ?, ?
+			)`,
+			infoId, dirPath, userId,
+			location, parentPath, name,
+			true, 0, shareID, infoStr,
+		)
+		if err != nil {
+			return err
+		}
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_file_info
+		set share_id=?
+		where path=?`,
+		shareID, dirPath,
+	)
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+func (st *BaseStore) DelSharing(ctx context.Context, userId uint64, dirPath string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_file_info
+		set share_id=''
+		where path=?`,
+		dirPath,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) ListSharingsByLocation(ctx context.Context, location string) (map[string]string, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	rows, err := tx.QueryContext(
+		ctx,
+		`select path, share_id
+		from t_file_info
+		where share_id<>'' and location=?`,
+		location,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var pathname, shareId string
+	pathToShareId := map[string]string{}
+	for rows.Next() {
+		err = rows.Scan(&pathname, &shareId)
+		if err != nil {
+			return nil, err
+		}
+		pathToShareId[pathname] = shareId
+	}
+	if rows.Err() != nil {
+		return nil, rows.Err()
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+
+	return pathToShareId, nil
+}
diff --git a/src/db/rdb/base/files_uploadings.go b/src/db/rdb/base/files_uploadings.go
new file mode 100644
index 0000000..26bec3c
--- /dev/null
+++ b/src/db/rdb/base/files_uploadings.go
@@ -0,0 +1,244 @@
+package base
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+
+	"github.com/ihexxa/quickshare/src/db"
+)
+
+func (st *BaseStore) addUploadInfoOnly(ctx context.Context, tx *sql.Tx, uploadId, userId uint64, tmpPath, filePath string, fileSize int64) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`insert into t_file_uploading (
+			id, real_path, tmp_path, user, size, uploaded
+		)
+		values (
+			?, ?, ?, ?, ?, ?
+		)`,
+		uploadId, filePath, tmpPath, userId, fileSize, 0,
+	)
+	return err
+}
+
+func (st *BaseStore) AddUploadInfos(ctx context.Context, uploadId, userId uint64, tmpPath, filePath string, info *db.FileInfo) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	userInfo, err := st.getUser(ctx, tx, userId)
+	if err != nil {
+		return err
+	} else if userInfo.UsedSpace+info.Size > int64(userInfo.Quota.SpaceLimit) {
+		return db.ErrQuota
+	}
+
+	_, _, _, err = st.getUploadInfo(ctx, tx, userId, filePath)
+	if err == nil {
+		return db.ErrKeyExisting
+	} else if err != nil && !errors.Is(err, sql.ErrNoRows) {
+		return err
+	}
+
+	userInfo.UsedSpace += info.Size
+	err = st.setUser(ctx, tx, userInfo)
+	if err != nil {
+		return err
+	}
+
+	err = st.addUploadInfoOnly(ctx, tx, uploadId, userId, tmpPath, filePath, info.Size)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) DelUploadingInfos(ctx context.Context, userId uint64, realPath string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	err = st.delUploadingInfos(ctx, tx, userId, realPath)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) delUploadingInfos(ctx context.Context, tx *sql.Tx, userId uint64, realPath string) error {
+	_, size, _, err := st.getUploadInfo(ctx, tx, userId, realPath)
+	if err != nil {
+		// info may not exist
+		return err
+	}
+
+	err = st.delUploadInfoOnly(ctx, tx, userId, realPath)
+	if err != nil {
+		return err
+	}
+
+	userInfo, err := st.getUser(ctx, tx, userId)
+	if err != nil {
+		return err
+	}
+	userInfo.UsedSpace -= size
+	return st.setUser(ctx, tx, userInfo)
+}
+
+func (st *BaseStore) delUploadInfoOnly(ctx context.Context, tx *sql.Tx, userId uint64, filePath string) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`delete from t_file_uploading
+		where real_path=? and user=?`,
+		filePath, userId,
+	)
+	return err
+}
+
+func (st *BaseStore) MoveUploadingInfos(ctx context.Context, infoId, userId uint64, uploadPath, itemPath string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, size, _, err := st.getUploadInfo(ctx, tx, userId, itemPath)
+	if err != nil {
+		return err
+	}
+	err = st.delUploadInfoOnly(ctx, tx, userId, itemPath)
+	if err != nil {
+		return err
+	}
+	err = st.addFileInfo(ctx, tx, infoId, userId, itemPath, &db.FileInfo{
+		Size: size,
+	})
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) SetUploadInfo(ctx context.Context, userId uint64, filePath string, newUploaded int64) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	var size, uploaded int64
+	err = tx.QueryRowContext(
+		ctx,
+		`select size, uploaded
+		from t_file_uploading
+		where real_path=? and user=?`,
+		filePath, userId,
+	).Scan(&size, &uploaded)
+	if err != nil {
+		return err
+	} else if newUploaded > size {
+		return db.ErrGreaterThanSize
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_file_uploading
+		set uploaded=?
+		where real_path=? and user=?`,
+		newUploaded, filePath, userId,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) getUploadInfo(ctx context.Context, tx *sql.Tx, userId uint64, filePath string) (string, int64, int64, error) {
+	var size, uploaded int64
+	err := tx.QueryRowContext(
+		ctx,
+		`select size, uploaded
+		from t_file_uploading
+		where real_path=? and user=?`,
+		filePath, userId,
+	).Scan(&size, &uploaded)
+	if err != nil {
+		return "", 0, 0, err
+	}
+
+	return filePath, size, uploaded, nil
+}
+
+func (st *BaseStore) GetUploadInfo(ctx context.Context, userId uint64, filePath string) (string, int64, int64, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return "", 0, 0, err
+	}
+	defer tx.Rollback()
+
+	filePath, size, uploaded, err := st.getUploadInfo(ctx, tx, userId, filePath)
+	if err != nil {
+		return filePath, size, uploaded, err
+	}
+
+	err = tx.Commit()
+	return filePath, size, uploaded, err
+}
+
+func (st *BaseStore) ListUploadInfos(ctx context.Context, userId uint64) ([]*db.UploadInfo, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	rows, err := tx.QueryContext(
+		ctx,
+		`select real_path, size, uploaded
+		from t_file_uploading
+		where user=?`,
+		userId,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var pathname string
+	var size, uploaded int64
+	infos := []*db.UploadInfo{}
+	for rows.Next() {
+		err = rows.Scan(
+			&pathname,
+			&size,
+			&uploaded,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		infos = append(infos, &db.UploadInfo{
+			RealFilePath: pathname,
+			Size:         size,
+			Uploaded:     uploaded,
+		})
+	}
+	if rows.Err() != nil {
+		return nil, rows.Err()
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return infos, nil
+}
diff --git a/src/db/rdb/base/init.go b/src/db/rdb/base/init.go
new file mode 100644
index 0000000..ed43bbc
--- /dev/null
+++ b/src/db/rdb/base/init.go
@@ -0,0 +1,233 @@
+package base
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"time"
+
+	"github.com/ihexxa/quickshare/src/db"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+var (
+	txOpts = &sql.TxOptions{}
+)
+
+type BaseStore struct {
+	db db.IDB
+}
+
+func NewBaseStore(db db.IDB) *BaseStore {
+	return &BaseStore{
+		db: db,
+	}
+}
+
+func (st *BaseStore) Db() db.IDB {
+	return st.db
+}
+
+func (st *BaseStore) Close() error {
+	return st.db.Close()
+}
+
+func (st *BaseStore) IsInited() bool {
+	// always try to init the db
+	return false
+}
+
+func (st *BaseStore) Init(ctx context.Context, rootName, rootPwd string, cfg *db.SiteConfig) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	err = st.InitUserTable(ctx, tx, rootName, rootPwd)
+	if err != nil {
+		return err
+	}
+
+	if err = st.InitFileTables(ctx, tx); err != nil {
+		return err
+	}
+
+	if err = st.InitConfigTable(ctx, tx, cfg); err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) InitUserTable(ctx context.Context, tx *sql.Tx, rootName, rootPwd string) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`create table if not exists t_user (
+			id bigint not null,
+			name varchar not null unique,
+			pwd varchar not null,
+			role integer not null,
+			used_space bigint not null,
+			quota varchar not null,
+			preference varchar not null,
+			primary key(id)
+		)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create index if not exists i_user_name on t_user (name)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	admin := &db.User{
+		ID:   0,
+		Name: rootName,
+		Pwd:  rootPwd,
+		Role: db.AdminRole,
+		Quota: &db.Quota{
+			SpaceLimit:         db.DefaultSpaceLimit,
+			UploadSpeedLimit:   db.DefaultUploadSpeedLimit,
+			DownloadSpeedLimit: db.DefaultDownloadSpeedLimit,
+		},
+		Preferences: &db.DefaultPreferences,
+	}
+	visitor := &db.User{
+		ID:   db.VisitorID,
+		Name: db.VisitorName,
+		Pwd:  rootPwd,
+		Role: db.VisitorRole,
+		Quota: &db.Quota{
+			SpaceLimit:         0,
+			UploadSpeedLimit:   db.VisitorUploadSpeedLimit,
+			DownloadSpeedLimit: db.VisitorDownloadSpeedLimit,
+		},
+		Preferences: &db.DefaultPreferences,
+	}
+	for _, user := range []*db.User{admin, visitor} {
+		_, err := st.getUser(ctx, tx, user.ID)
+		if err != nil {
+			if errors.Is(err, db.ErrUserNotFound) {
+				err = st.addUser(ctx, tx, user)
+				if err != nil {
+					return err
+				}
+			} else {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (st *BaseStore) InitFileTables(ctx context.Context, tx *sql.Tx) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`create table if not exists t_file_info (
+			id bigint not null,
+			path varchar not null,
+			user bigint not null,
+			location varchar not null,
+			parent varchar not null,
+			name varchar not null,
+			is_dir boolean not null,
+			size bigint not null,
+			share_id varchar not null,
+			info varchar not null,
+			primary key(id)
+		)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create index if not exists t_file_path on t_file_info (path, location)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create index if not exists t_file_share on t_file_info (share_id, location)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create table if not exists t_file_uploading (
+			id bigint not null,
+			real_path varchar not null,
+			tmp_path varchar not null unique,
+			user bigint not null,
+			size bigint not null,
+			uploaded bigint not null,
+			primary key(id)
+		)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create index if not exists t_file_uploading_path on t_file_uploading (real_path, user)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`create index if not exists t_file_uploading_user on t_file_uploading (user)`,
+	)
+	return err
+}
+
+func (st *BaseStore) InitConfigTable(ctx context.Context, tx *sql.Tx, cfg *db.SiteConfig) error {
+	_, err := tx.ExecContext(
+		ctx,
+		`create table if not exists t_config (
+			id bigint not null,
+			config varchar not null,
+			modified datetime not null,
+			primary key(id)
+		)`,
+	)
+	if err != nil {
+		return err
+	}
+
+	cfgStr, err := json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	_, err = st.getCfg(ctx, tx)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			_, err = tx.ExecContext(
+				ctx,
+				`insert into t_config
+				(id, config, modified) values (?, ?, ?)`,
+				0, cfgStr, time.Now(),
+			)
+			return err
+		}
+		return err
+	}
+
+	return nil
+}
diff --git a/src/db/rdb/base/users.go b/src/db/rdb/base/users.go
new file mode 100644
index 0000000..69d4590
--- /dev/null
+++ b/src/db/rdb/base/users.go
@@ -0,0 +1,424 @@
+package base
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/ihexxa/quickshare/src/db"
+)
+
+func (st *BaseStore) setUser(ctx context.Context, tx *sql.Tx, user *db.User) error {
+	var err error
+	if err = db.CheckUser(user, false); err != nil {
+		return err
+	}
+
+	quotaStr, err := json.Marshal(user.Quota)
+	if err != nil {
+		return err
+	}
+	preferencesStr, err := json.Marshal(user.Preferences)
+	if err != nil {
+		return err
+	}
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set name=?, pwd=?, role=?, used_space=?, quota=?, preference=?
+		where id=?`,
+		user.Name,
+		user.Pwd,
+		user.Role,
+		user.UsedSpace,
+		quotaStr,
+		preferencesStr,
+		user.ID,
+	)
+	return err
+}
+
+func (st *BaseStore) getUser(ctx context.Context, tx *sql.Tx, id uint64) (*db.User, error) {
+	user := &db.User{}
+	var quotaStr, preferenceStr string
+	err := tx.QueryRowContext(
+		ctx,
+		`select id, name, pwd, role, used_space, quota, preference
+		from t_user
+		where id=?`,
+		id,
+	).Scan(
+		&user.ID,
+		&user.Name,
+		&user.Pwd,
+		&user.Role,
+		&user.UsedSpace,
+		&quotaStr,
+		&preferenceStr,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, db.ErrUserNotFound
+		}
+		return nil, err
+	}
+
+	err = json.Unmarshal([]byte(quotaStr), &user.Quota)
+	if err != nil {
+		return nil, err
+	}
+	err = json.Unmarshal([]byte(preferenceStr), &user.Preferences)
+	if err != nil {
+		return nil, err
+	}
+	return user, nil
+}
+
+func (st *BaseStore) addUser(ctx context.Context, tx *sql.Tx, user *db.User) error {
+	quotaStr, err := json.Marshal(user.Quota)
+	if err != nil {
+		return err
+	}
+	preferenceStr, err := json.Marshal(user.Preferences)
+	if err != nil {
+		return err
+	}
+	_, err = tx.ExecContext(
+		ctx,
+		`insert into t_user (id, name, pwd, role, used_space, quota, preference) values (?, ?, ?, ?, ?, ?, ?)`,
+		user.ID,
+		user.Name,
+		user.Pwd,
+		user.Role,
+		user.UsedSpace,
+		quotaStr,
+		preferenceStr,
+	)
+	return err
+}
+
+func (st *BaseStore) AddUser(ctx context.Context, user *db.User) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	err = st.addUser(ctx, tx, user)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) DelUser(ctx context.Context, id uint64) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, err = tx.ExecContext(
+		ctx,
+		`delete from t_user where id=?`,
+		id,
+	)
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+func (st *BaseStore) GetUser(ctx context.Context, id uint64) (*db.User, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	user, err := st.getUser(ctx, tx, id)
+	if err != nil {
+		return nil, err
+	}
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return user, err
+}
+
+func (st *BaseStore) GetUserByName(ctx context.Context, name string) (*db.User, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	user := &db.User{}
+	var quotaStr, preferenceStr string
+	err = tx.QueryRowContext(
+		ctx,
+		`select id, name, pwd, role, used_space, quota, preference
+		from t_user
+		where name=?`,
+		name,
+	).Scan(
+		&user.ID,
+		&user.Name,
+		&user.Pwd,
+		&user.Role,
+		&user.UsedSpace,
+		&quotaStr,
+		&preferenceStr,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, db.ErrUserNotFound
+		}
+		return nil, err
+	}
+
+	err = json.Unmarshal([]byte(quotaStr), &user.Quota)
+	if err != nil {
+		return nil, err
+	}
+	err = json.Unmarshal([]byte(preferenceStr), &user.Preferences)
+	if err != nil {
+		return nil, err
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return user, nil
+}
+
+func (st *BaseStore) SetPwd(ctx context.Context, id uint64, pwd string) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set pwd=?
+		where id=?`,
+		pwd,
+		id,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+// role + quota
+func (st *BaseStore) SetInfo(ctx context.Context, id uint64, user *db.User) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	quotaStr, err := json.Marshal(user.Quota)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set role=?, quota=?
+		where id=?`,
+		user.Role, quotaStr,
+		id,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) SetPreferences(ctx context.Context, id uint64, prefers *db.Preferences) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	preferenceStr, err := json.Marshal(prefers)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set preference=?
+		where id=?`,
+		preferenceStr,
+		id,
+	)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) SetUsed(ctx context.Context, id uint64, incr bool, capacity int64) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	err = st.setUsed(ctx, tx, id, incr, capacity)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (st *BaseStore) setUsed(ctx context.Context, tx *sql.Tx, id uint64, incr bool, capacity int64) error {
+	gotUser, err := st.getUser(ctx, tx, id)
+	if err != nil {
+		return err
+	}
+
+	if incr && gotUser.UsedSpace+capacity > int64(gotUser.Quota.SpaceLimit) {
+		return db.ErrReachedLimit
+	}
+
+	if incr {
+		gotUser.UsedSpace = gotUser.UsedSpace + capacity
+	} else {
+		if gotUser.UsedSpace-capacity < 0 {
+			return db.ErrNegtiveUsedSpace
+		}
+		gotUser.UsedSpace = gotUser.UsedSpace - capacity
+	}
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set used_space=?
+		where id=?`,
+		gotUser.UsedSpace,
+		gotUser.ID,
+	)
+	return err
+}
+
+func (st *BaseStore) ResetUsed(ctx context.Context, id uint64, used int64) error {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, err = tx.ExecContext(
+		ctx,
+		`update t_user
+		set used_space=?
+		where id=?`,
+		used,
+		id,
+	)
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+func (st *BaseStore) ListUsers(ctx context.Context) ([]*db.User, error) {
+	tx, err := st.db.BeginTx(ctx, txOpts)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+
+	// TODO: support pagination
+	rows, err := tx.QueryContext(
+		ctx,
+		`select id, name, role, used_space, quota, preference
+		from t_user`,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, db.ErrUserNotFound
+		}
+		return nil, err
+	}
+	defer rows.Close() // TODO: check error
+
+	users := []*db.User{}
+	for rows.Next() {
+		user := &db.User{}
+		var quotaStr, preferenceStr string
+		err = rows.Scan(
+			&user.ID,
+			&user.Name,
+			&user.Role,
+			&user.UsedSpace,
+			&quotaStr,
+			&preferenceStr,
+		)
+		err = json.Unmarshal([]byte(quotaStr), &user.Quota)
+		if err != nil {
+			return nil, err
+		}
+		err = json.Unmarshal([]byte(preferenceStr), &user.Preferences)
+		if err != nil {
+			return nil, err
+		}
+
+		users = append(users, user)
+	}
+	if rows.Err() != nil {
+		return nil, rows.Err()
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return nil, err
+	}
+	return users, nil
+}
+
+func (st *BaseStore) ListUserIDs(ctx context.Context) (map[string]string, error) {
+	users, err := st.ListUsers(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	nameToId := map[string]string{}
+	for _, user := range users {
+		nameToId[user.Name] = fmt.Sprint(user.ID)
+	}
+	return nameToId, nil
+}
+
+func (st *BaseStore) AddRole(role string) error {
+	// TODO: implement this after adding grant/revoke
+	panic("not implemented")
+}
+
+func (st *BaseStore) DelRole(role string) error {
+	// TODO: implement this after adding grant/revoke
+	panic("not implemented")
+}
+
+func (st *BaseStore) ListRoles() (map[string]bool, error) {
+	// TODO: implement this after adding grant/revoke
+	panic("not implemented")
+}