diff --git a/backend/common/media_store/store.go b/backend/common/media_store/store.go
new file mode 100644
index 0000000..d6db2ad
--- /dev/null
+++ b/backend/common/media_store/store.go
@@ -0,0 +1,80 @@
+package media_store
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
+)
+
+type Store []UUIDMap
+
+type UUIDMap struct {
+	UUID string
+	Name string
+}
+
+func NewStore(path string) (*Store, error) {
+	mapFile := filepath.Join(path, "map.json")
+	log.Infof("read in from: %s", mapFile)
+	if _, err := os.Stat(mapFile); err != nil {
+		if os.IsNotExist(err) {
+			if err := os.WriteFile(mapFile, []byte("[]"), os.ModePerm); err != nil {
+				return nil, errors.Wrapf(err, "write file: %s", mapFile)
+			}
+		}
+	}
+
+	b, err := os.ReadFile(mapFile)
+	if err != nil {
+		return nil, errors.Wrapf(err, "read file: %s", mapFile)
+	}
+
+	var store Store
+	err = json.Unmarshal(b, &store)
+	if err != nil {
+		return nil, errors.Wrapf(err, "unmarshal json: %s", mapFile)
+	}
+
+	return &store, nil
+}
+
+func (s *Store) Save(path string) error {
+	mapFile := filepath.Join(path, "map.json")
+	b, err := json.Marshal(s)
+	if err != nil {
+		return errors.Wrapf(err, "marshal json: %s", mapFile)
+	}
+
+	if err := os.WriteFile(mapFile, b, os.ModePerm); err != nil {
+		return errors.Wrapf(err, "write file: %s", mapFile)
+	}
+
+	return nil
+}
+
+func (s *Store) Add(uuid, name string) {
+	*s = append(*s, UUIDMap{UUID: uuid, Name: name})
+}
+
+func (s *Store) UUIDs() []string {
+	var uuids []string
+	for _, m := range *s {
+		uuids = append(uuids, m.UUID)
+	}
+
+	return uuids
+}
+
+// Exists
+func (s *Store) Exists(name string) bool {
+	for _, m := range *s {
+		if m.Name == name {
+			return true
+		}
+	}
+
+	return false
+}
diff --git a/backend/modules/tasks/discover/discover_medias.go b/backend/modules/tasks/discover/discover_medias.go
index ff2464e..6599502 100644
--- a/backend/modules/tasks/discover/discover_medias.go
+++ b/backend/modules/tasks/discover/discover_medias.go
@@ -1,17 +1,17 @@
 package discover
 
 import (
-	"encoding/json"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 
+	"backend/common/media_store"
 	"backend/modules/medias"
+	"backend/pkg/path"
 
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
-	"github.com/samber/lo"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -21,11 +21,6 @@ type DiscoverMedias struct {
 	log       *log.Entry `inject:"false"`
 }
 
-type MediaUuidMap struct {
-	UUID string
-	Name string
-}
-
 // Prepare
 func (d *DiscoverMedias) Prepare() error {
 	d.log = log.WithField("module", "DiscoverMedias")
@@ -38,36 +33,15 @@ func (d *DiscoverMedias) RunE(from, to string) error {
 		return errors.New("from or to is empty")
 	}
 
-	mapFile := filepath.Join(to, "map.json")
-	d.log.Infof("read in from: %s", mapFile)
-	if _, err := os.Stat(mapFile); err != nil {
-		if os.IsNotExist(err) {
-			if err := os.WriteFile(mapFile, []byte("[]"), os.ModePerm); err != nil {
-				return errors.Wrapf(err, "write file: %s", mapFile)
-			}
-		}
-	}
-
-	b, err := os.ReadFile(mapFile)
+	store, err := media_store.NewStore(to)
 	if err != nil {
-		return errors.Wrapf(err, "read file: %s", mapFile)
-	}
-
-	var store []MediaUuidMap
-	err = json.Unmarshal(b, &store)
-	if err != nil {
-		return errors.Wrapf(err, "unmarshal json: %s", mapFile)
+		return errors.Wrapf(err, "new store: %s", to)
 	}
 	defer func() {
-		d.runCleanup(to, store)
+		d.runCleanup(to)
 	}()
 
-	storeMap := make(map[string]string)
-	for _, item := range store {
-		storeMap[item.Name] = item.UUID
-	}
-
-	dirs, err := d.getSubDirs(from)
+	dirs, err := path.GetSubDirs(from)
 	if err != nil {
 		return errors.Wrapf(err, "get sub dirs: %s", from)
 	}
@@ -75,7 +49,7 @@ func (d *DiscoverMedias) RunE(from, to string) error {
 	for _, dir := range dirs {
 		d.log.Infof("Discover medias in: %s", dir)
 
-		if _, ok := storeMap[dir]; ok {
+		if exists := store.Exists(dir); exists {
 			d.log.Infof("Skip dir: %s", dir)
 			continue
 		}
@@ -103,47 +77,15 @@ func (d *DiscoverMedias) RunE(from, to string) error {
 			}
 		}
 
-		store = append(store, MediaUuidMap{
-			UUID: uuid,
-			Name: dir,
-		})
-
-		b, err := json.Marshal(store)
-		if err != nil {
-			return errors.Wrapf(err, "marshal json: %s", mapFile)
+		store.Add(uuid, dir)
+		if err := store.Save(to); err != nil {
+			return errors.Wrapf(err, "store save: %s", to)
 		}
-		if err := os.WriteFile(mapFile, b, os.ModePerm); err != nil {
-			return errors.Wrapf(err, "write file: %s", mapFile)
-		}
-		storeMap[dir] = uuid
-		d.log.Infof("Store map: %s", storeMap)
 	}
 
 	return nil
 }
 
-func (d *DiscoverMedias) getSubDirs(root string) ([]string, error) {
-	fd, err := os.Open(root)
-	if err != nil {
-		return nil, errors.Wrapf(err, "open root directory: %s", root)
-	}
-	defer fd.Close()
-
-	entries, err := fd.Readdir(-1)
-	if err != nil {
-		return nil, errors.Wrapf(err, "read root directory: %s", root)
-	}
-
-	var paths []string
-	for _, entry := range entries {
-		if entry.IsDir() {
-			paths = append(paths, entry.Name())
-		}
-	}
-
-	return paths, nil
-}
-
 func (d *DiscoverMedias) globVideo(root string) []string {
 	files := []string{}
 
@@ -247,23 +189,27 @@ func (d *DiscoverMedias) ffmpegAudioToM3U8(input string, output string) error {
 	return nil
 }
 
-func (d *DiscoverMedias) runCleanup(to string, store []MediaUuidMap) {
-	uuids := lo.Map(store, func(item MediaUuidMap, _ int) string {
-		return item.UUID
-	})
+func (d *DiscoverMedias) runCleanup(to string) {
+	store, err := media_store.NewStore(to)
+	if err != nil {
+		d.log.Errorf("new store: %s", to)
+		return
+	}
 
-	dirs, err := d.getSubDirs(to)
+	dirs, err := path.GetSubDirs(to)
 	if err != nil {
 		d.log.Errorf("get sub dirs: %s", to)
 		return
 	}
 
 	for _, dir := range dirs {
-		if !lo.Contains(uuids, dir) {
-			d.log.Infof("Remove dir: %s", dir)
-			if err := os.RemoveAll(filepath.Join(to, dir)); err != nil {
-				d.log.Errorf("Remove dir: %s", dir)
-			}
+		if store.Exists(dir) {
+			continue
+		}
+
+		d.log.Infof("Remove dir: %s", dir)
+		if err := os.RemoveAll(filepath.Join(to, dir)); err != nil {
+			d.log.Errorf("Remove dir: %s", dir)
 		}
 	}
 }
diff --git a/backend/modules/tasks/discover/discover_medias_test.go b/backend/modules/tasks/discover/discover_medias_test.go
index a400f75..23eadc2 100644
--- a/backend/modules/tasks/discover/discover_medias_test.go
+++ b/backend/modules/tasks/discover/discover_medias_test.go
@@ -36,15 +36,6 @@ func Test_DiscoverMedias(t *testing.T) {
 	})
 }
 
-func (t *DiscoverMediasTestSuite) Test_getSubDirs() {
-	Convey("Test_getSubDirs", t.T(), func() {
-		dirs, err := t.Svc.getSubDirs("/mnt/yangpingliang/动态曲谱")
-		So(err, ShouldBeNil)
-
-		t.T().Logf("Dirs: %+v", dirs)
-	})
-}
-
 func (t *DiscoverMediasTestSuite) Test_getVideo() {
 	Convey("Test_getVideo", t.T(), func() {
 		dirs := t.Svc.globVideo("/mnt/yangpingliang/动态曲谱/河北梆子伴奏《李慧娘》依然还我生前摸样")
diff --git a/backend/modules/tasks/store/store_medias.go b/backend/modules/tasks/store/store_medias.go
new file mode 100644
index 0000000..84c601f
--- /dev/null
+++ b/backend/modules/tasks/store/store_medias.go
@@ -0,0 +1,25 @@
+package store
+
+import (
+	"backend/modules/medias"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// @provider
+type StoreMedias struct {
+	mediasSvc *medias.Service
+	log       *log.Entry `inject:"false"`
+}
+
+// Prepare
+func (d *StoreMedias) Prepare() error {
+	d.log = log.WithField("module", "StoreMedias")
+	return nil
+}
+
+func (d *StoreMedias) RunE(targetPath string) error {
+	d.log.Infof("Store medias from: %s ", targetPath)
+
+	return nil
+}
diff --git a/backend/pkg/path/fs.go b/backend/pkg/path/fs.go
new file mode 100644
index 0000000..13ee15f
--- /dev/null
+++ b/backend/pkg/path/fs.go
@@ -0,0 +1,29 @@
+package path
+
+import (
+	"os"
+
+	"github.com/pkg/errors"
+)
+
+func GetSubDirs(root string) ([]string, error) {
+	fd, err := os.Open(root)
+	if err != nil {
+		return nil, errors.Wrapf(err, "open root directory: %s", root)
+	}
+	defer fd.Close()
+
+	entries, err := fd.Readdir(-1)
+	if err != nil {
+		return nil, errors.Wrapf(err, "read root directory: %s", root)
+	}
+
+	var paths []string
+	for _, entry := range entries {
+		if entry.IsDir() {
+			paths = append(paths, entry.Name())
+		}
+	}
+
+	return paths, nil
+}