diff --git a/pinneddata.js b/pinneddata.js
index 8dbbc7fec..2ecf8605d 100644
--- a/pinneddata.js
+++ b/pinneddata.js
@@ -30,7 +30,7 @@ const sizeForHashes = (hashes, dsFileStats) => {
     let sum = 0;
     hashes.forEach((h) => {
         const s = dsFileStats[h];
-        if (typeof(s) !== 'number') {
+        if (typeof(s) !== 'object' || typeof(s.size) !== 'number') {
             //console.log('missing ' + h + '  ' + typeof(s));
         } else {
             sum += s.size;
@@ -62,11 +62,26 @@ nThen((waitFor) => {
         });
     });
 }).nThen((waitFor) => {
+
+    Fs.readdir('./blob', waitFor((err, list) => {
+        if (err) { throw err; }
+        dirList = list;
+    }));
+}).nThen((waitFor) => {
+    dirList.forEach((f) => {
+        sema.take((returnAfter) => {
+            Fs.readdir('./blob/' + f, waitFor(returnAfter((err, list2) => {
+                if (err) { throw err; }
+                list2.forEach((ff) => { fileList.push('./blob/' + f + '/' + ff); });
+            })));
+        });
+    });
+}).nThen((waitFor) => {
     fileList.forEach((f) => {
         sema.take((returnAfter) => {
             Fs.stat(f, waitFor(returnAfter((err, st) => {
                 if (err) { throw err; }
-                dsFileStats[f.replace(/^.*\/([^\/]*)\.ndjson$/, (all, a) => (a))] = st;
+                dsFileStats[f.replace(/^.*\/([^\/\.]*)(\.ndjson)?$/, (all, a) => (a))] = st;
             })));
         });
     });
diff --git a/www/common/common-title.js b/www/common/common-title.js
index 3b71ec63e..dcdbed055 100644
--- a/www/common/common-title.js
+++ b/www/common/common-title.js
@@ -1,4 +1,4 @@
-define(function () {
+define(['jquery'], function ($) {
     var module = {};
 
     module.create = function (cfg, onLocal, Cryptpad) {
@@ -45,7 +45,8 @@ define(function () {
         };
 
         // update title: href is optional; if not specified, we use window.location.href
-        exp.updateTitle = function (newTitle, href) {
+        exp.updateTitle = function (newTitle, href, cb) {
+            cb = cb || $.noop;
             if (newTitle === exp.title) { return; }
             // Change the title now, and set it back to the old value if there is an error
             var oldTitle = exp.title;
@@ -54,9 +55,10 @@ define(function () {
                     console.log("Couldn't set pad title");
                     console.error(err);
                     updateLocalTitle(oldTitle);
-                    return;
+                    return void cb(err);
                 }
                 updateLocalTitle(data);
+                cb(null, data);
                 if (!$title) { return; }
                 $title.find('span.title').text(data);
                 $title.find('input').val(data);
diff --git a/www/common/cryptpad-common.js b/www/common/cryptpad-common.js
index aefc86a31..901d33079 100644
--- a/www/common/cryptpad-common.js
+++ b/www/common/cryptpad-common.js
@@ -78,7 +78,7 @@ define([
     var deduplicateString = common.deduplicateString = Util.deduplicateString;
     common.uint8ArrayToHex = Util.uint8ArrayToHex;
     common.replaceHash = Util.replaceHash;
-    var getHash = common.getHash = Util.getHash;
+    common.getHash = Util.getHash;
     common.fixFileName = Util.fixFileName;
     common.bytesToMegabytes = Util.bytesToMegabytes;
     common.bytesToKilobytes = Util.bytesToKilobytes;
@@ -426,9 +426,8 @@ define([
 
     // STORAGE
     common.setPadAttribute = function (attr, value, cb) {
-        getStore().setDrive([getHash(), attr].join('.'), value, function (err, data) {
-            cb(err, data);
-        });
+        var href = getRelativeHref(window.location.href);
+        getStore().setPadAttribute(href, attr, value, cb);
     };
     common.setAttribute = function (attr, value, cb) {
         getStore().set(["cryptpad", attr].join('.'), value, function (err, data) {
@@ -441,9 +440,8 @@ define([
 
     // STORAGE
     common.getPadAttribute = function (attr, cb) {
-        getStore().getDrive([getHash(), attr].join('.'), function (err, data) {
-            cb(err, data);
-        });
+        var href = getRelativeHref(window.location.href);
+        getStore().getPadAttribute(href, attr, cb);
     };
     common.getAttribute = function (attr, cb) {
         getStore().get(["cryptpad", attr].join('.'), function (err, data) {
diff --git a/www/common/fsStore.js b/www/common/fsStore.js
index aa3e69530..b47d3c50e 100644
--- a/www/common/fsStore.js
+++ b/www/common/fsStore.js
@@ -60,6 +60,9 @@ define([
             cb(void 0, res);
         };
 
+        ret.setPadAttribute = filesOp.setAttribute;
+        ret.getPadAttribute = filesOp.getAttribute;
+
         ret.getDrive = function (key, cb) {
             cb(void 0, storeObj.drive[key]);
         };
diff --git a/www/common/userObject.js b/www/common/userObject.js
index b21fb739a..7a0dba83c 100644
--- a/www/common/userObject.js
+++ b/www/common/userObject.js
@@ -132,6 +132,21 @@ define([
             if (type === 'name') { return data.filename; }
             return data.filename || data.title || NEW_FILE_NAME;
         };
+        exp.getAttribute = function (href, attr, cb) {
+            cb = cb || $.noop;
+            var id = exp.getIdFromHref(href);
+            if (!id) { return void cb(null, undefined); }
+            var data = getFileData(id);
+            cb(null, data[attr]);
+        };
+        exp.setAttribute = function (href, attr, value, cb) {
+            cb = cb || $.noop;
+            var id = exp.getIdFromHref(href);
+            if (!id) { return void cb("E_INVAL_HREF"); }
+            if (!attr || !attr.trim()) { return void cb("E_INVAL_ATTR"); }
+            var data = getFileData(id);
+            data[attr] = value;
+        };
 
         // PATHS
 
@@ -970,6 +985,20 @@ define([
                     us.splice(idx, 1);
                 });
             };
+            var migrateAttributes = function (el, id, parsed) {
+                // Migrate old pad attributes
+                ['userid', 'previewMode'].forEach(function (attr) {
+                    var key = parsed.hash + '.' + attr;
+                    var key2 = parsed.hash.slice(0,-1) + '.' + attr;// old pads not ending with /
+                    if (files[key] || files[key2]) {
+                        debug("Migrating pad attribute", attr, "for pad", id);
+                        el[attr] = files[key] || files[key2];
+                    }
+                    delete files[key];
+                    delete files[key2];
+                });
+                // Migration done
+            };
             var fixFilesData = function () {
                 if (typeof files[FILES_DATA] !== "object") { debug("OLD_FILES_DATA was not an object"); files[FILES_DATA] = {}; }
                 var fd = files[FILES_DATA];
@@ -989,6 +1018,15 @@ define([
                         toClean.push(id);
                         continue;
                     }
+                    var parsed = Cryptpad.parsePadUrl(el.href);
+                    if (!parsed.hash) {
+                        debug("Removing an element in filesData with a invalid href.", el);
+                        toClean.push(id);
+                        continue;
+                    }
+
+                    migrateAttributes(el, id, parsed);
+
                     if ((Cryptpad.isLoggedIn() || config.testMode) && rootFiles.indexOf(id) === -1) {
                         debug("An element in filesData was not in ROOT, TEMPLATE or TRASH.", id, el);
                         var newName = Cryptpad.createChannelId();
@@ -1001,12 +1039,19 @@ define([
                 });
             };
 
+            var fixDrive = function () {
+                Object.keys(files).forEach(function (key) {
+                    if (key.slice(0,1) === '/') { delete files[key]; }
+                });
+            };
+
             fixRoot();
             fixTrashRoot();
             if (!workgroup) {
                 fixTemplate();
                 fixFilesData();
             }
+            fixDrive();
 
             if (JSON.stringify(files) !== before) {
                 debug("Your file system was corrupted. It has been cleaned so that the pads you visit can be stored safely");
diff --git a/www/drive/tests.js b/www/drive/tests.js
index ddc3b0fb7..5861e5410 100644
--- a/www/drive/tests.js
+++ b/www/drive/tests.js
@@ -242,6 +242,18 @@ define([
             fo.migrate(todo);
         }, "DRIVE4: migration and fixFiles with a pad in trash not root");
 
+        // Pad attributes migration
+        assert(function (cb) {
+            console.log('START PAD ATTRIBUTES');
+            var files = JSON.parse(JSON.stringify(example));
+            files[href1.slice(6) + '.userid'] = 'value';
+            files[href1.slice(6) + '.previewMode'] = true;
+            var fo = FO.init(files, config);
+            fo.fixFiles();
+            return cb(files.filesData[id1].userid === 'value'
+                        && files.filesData[id1].previewMode);
+        }, "PAD ATTRIBUTES");
+
         // userObject Tests
 
         // UTILS
diff --git a/www/poll/main.js b/www/poll/main.js
index b8085f56a..ecb308a36 100644
--- a/www/poll/main.js
+++ b/www/poll/main.js
@@ -552,11 +552,19 @@ var ready = function (info, userid, readOnly) {
     } else {
         APP.proxy.info.defaultTitle = Title.defaultTitle;
     }
+
+    var andThen = function () {
+        if (readOnly) { return; }
+        Cryptpad.setPadAttribute('userid', userid, function (e) {
+            if (e) { console.error(e); }
+        });
+    };
+
     if (Cryptpad.initialName && !APP.proxy.info.title) {
         APP.proxy.info.title = Cryptpad.initialName;
-        Title.updateTitle(Cryptpad.initialName);
+        Title.updateTitle(Cryptpad.initialName, null, andThen);
     } else {
-        Title.updateTitle(APP.proxy.info.title || Title.defaultTitle);
+        Title.updateTitle(APP.proxy.info.title || Title.defaultTitle, null, andThen);
     }
 
     // Description
@@ -621,6 +629,7 @@ var ready = function (info, userid, readOnly) {
     } else {
         publish(true);
     }
+
     Cryptpad.removeLoadingScreen();
 
     if (readOnly) { return; }
@@ -760,10 +769,7 @@ var create = function (info) {
                 if (e) { console.error(e); }
                 if (!userid) { userid = Render.coluid(); }
                 APP.userid = userid;
-                Cryptpad.setPadAttribute('userid', userid, function (e) {
-                    if (e) { console.error(e); }
-                    ready(info, userid, readOnly);
-                });
+                ready(info, userid, readOnly);
             });
         })
         .on('disconnect', disconnect)