diff --git a/app/collections/playlists.js b/app/collections/playlists.js
index 0070b35..eebcd12 100644
--- a/app/collections/playlists.js
+++ b/app/collections/playlists.js
@@ -44,8 +44,7 @@ const Playlists = Backbone.Collection.extend({
         }
     },
 
-    parse(resp, options) {
-        let playlists = JSON.parse('' + resp);
+    parse(playlists, options) {
         let result = [];
         for (let i = 0; i < playlists.length; i++) {
             result.push(playlists[i].value);
diff --git a/app/collections/tracks.js b/app/collections/tracks.js
index cb99df1..22a5b39 100644
--- a/app/collections/tracks.js
+++ b/app/collections/tracks.js
@@ -80,9 +80,8 @@ const Tracks = Backbone.Collection.extend({
         }
     },
 
-    parse(resp, options) {
+    parse(tracks, options) {
         let result = [];
-        let tracks = JSON.parse('' + resp);
         for (let i = 0; i < tracks.length; i++) {
             result.push(tracks[i].value);
         }
@@ -99,12 +98,21 @@ cozysdk.defineRequest('File', 'music', (doc) => {
 });
 
 cozysdk.defineRequest('Track', 'all', (doc) => {
+    if (!doc._attachments) {
         emit(doc._id, doc);
+    }
+    }, (error, response) => {
+});
+
+cozysdk.defineRequest('Track', 'oldDoctype', (doc) => {
+        if (doc.title) {
+            emit(doc._id, doc);
+        }
     }, (error, response) => {
 });
 
 cozysdk.defineRequest('Track', 'playable', (doc) => {
-        if (!doc.hidden) {
+        if (!doc.hidden && !doc._attachments) {
             emit(doc._id, doc);
         }
     }, (error, response) => {
diff --git a/app/libs/file.js b/app/libs/file.js
index 0e4e61b..b4ede61 100644
--- a/app/libs/file.js
+++ b/app/libs/file.js
@@ -1,25 +1,115 @@
 import Track from '../models/track';
 import application from '../application';
 import cozysdk from 'cozysdk-client';
-
+import async from 'async';
 
 export function syncFiles() {
-    cozysdk.run('File', 'music', {}, (err, res) => {
-        if (res) {
-            let files = JSON.parse('' + res);
+    cozysdk.run('Track', 'oldDoctype', {}, (err, tracks) => {
+        if (tracks.length > 0) {
+            createCozicFolder(tracks);
+        } else {
+            fileSynchronisation();
+        }
+    });
+}
+
+function fileSynchronisation() {
+    cozysdk.run('File', 'music', {}, (err, files) => {
+        if (files) {
             getAllTracksFileId(files);
         }
     });
 }
 
+// Create Cozic Folder
+function createCozicFolder(tracks) {
+    cozysdk.defineRequest('Folder', 'Cozic', (doc) => {
+            if (doc.name == 'Cozic') {
+                emit(doc._id, doc);
+            }
+        }, (error, response) => {
+            cozysdk.run('Folder', 'Cozic', {}, (err, folder) => {
+                if (folder.length == 0) {
+                    let folder = {
+                        "path": "",
+                        "name": "Cozic",
+                        "docType": "folder",
+                        "creationDate": Date.now,
+                        "lastModification": Date.now,
+                        "tags": []
+                    }
+                    cozysdk.create('Folder', folder, (err, res) => {
+                        convertToBinaries(tracks);
+                    });
+                } else {
+                    convertToBinaries(tracks);
+                }
+            });
+    });
+}
+
+// Convert attachment into a binary
+function convertToBinaries(tracks) {
+    async.eachSeries(tracks, convertOneTrack, (err) => {
+        fileSynchronisation();
+    });
+}
+
+function convertOneTrack(track, callback) {
+    track = track.value;
+    cozysdk.convertToBinaries(track._id, 'file', (err, resp) => {
+        if (resp) {
+            getTrack(track, callback);
+        }
+    });
+}
+
+// Get track info
+function getTrack(track, callback) {
+    cozysdk.find('Track', track._id, (err, newTrack) => {
+        getBinary(newTrack, callback);
+    });
+}
+
+// Get binary info
+function getBinary(track, callback) {
+    let binaryId = track.binary.file.id;
+    cozysdk.find('Binary', binaryId, (err, binary) => {
+        migrateTrack(track, binary, callback);
+    });
+}
+
+// Delete the old track and create a File doctype
+function migrateTrack(track, binary, callback) {
+    let file = {
+       'path': '/Cozic',
+       'name': track.slug,
+       'docType': 'file',
+       'mime': 'audio/mpeg',
+       'creationDate': Date.now,
+       'lastModification': Date.now,
+       'class': 'music',
+       'size': binary._attachments.file.length,
+       'tags': [],
+       'uploading': false,
+       'binary': track.binary,
+       'checksum': ''
+    }
+    cozysdk.create('File', file, (err, res) => {
+        cozysdk.destroy('Track', track._id, (err, res) => {
+            callback();
+        });
+    });
+}
+
+
 // Get all needed variable
 function getAllTracksFileId(musicFiles) {
-    cozysdk.run('Track', 'file', {}, (err, res) => {
+    cozysdk.run('Track', 'file', {}, (err, tracks) => {
         let tracksFileId = [];
         let allTracksFiles = [];
         let musicFilesFileId = [];
-        if (res) {
-            let tracks = JSON.parse('' + res);
+        if (tracks) {
             for (let i = 0; i < tracks.length; i++) {
                 tracksFileId.push(tracks[i].value.ressource.fileID);
                 allTracksFiles.push(new Track(tracks[i].value));
diff --git a/package.json b/package.json
index d66f1c2..f98a108 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
     "url": "https://github.com/flyingrub/cozy-music.git"
   },
   "dependencies": {
+    "async": "^2.0.0-rc.2",
     "backbone": "^1.2.3",
     "backbone.marionette": "^2.4.4",
     "backbone.radio": "^1.0.2",