diff --git a/src/app/files/browser-files-tree.js b/src/app/files/browser-files-tree.js
index b9bde21c2d..16ce5a60c2 100644
--- a/src/app/files/browser-files-tree.js
+++ b/src/app/files/browser-files-tree.js
@@ -53,11 +53,12 @@ function FilesTree (name, storage) {
     return content
   }
 
-  this.set = function (path, content) {
+  this.set = function (path, content, cb) {
     var unprefixedpath = this.removePrefix(path)
     updateRefs(unprefixedpath, 'add')
     var exists = storage.exists(unprefixedpath)
     if (!storage.set(unprefixedpath, content)) {
+      if (cb) cb('error updating ' + path)
       return false
     }
     if (!exists) {
@@ -65,6 +66,7 @@ function FilesTree (name, storage) {
     } else {
       event.trigger('fileChanged', [this.type + '/' + unprefixedpath])
     }
+    if (cb) cb()
     return true
   }
 
diff --git a/src/app/files/browser-files.js b/src/app/files/browser-files.js
index e0a25e6db8..8179622f02 100644
--- a/src/app/files/browser-files.js
+++ b/src/app/files/browser-files.js
@@ -38,16 +38,18 @@ function Files (storage) {
     return content
   }
 
-  this.set = function (path, content) {
+  this.set = function (path, content, cb) {
     var unprefixedpath = this.removePrefix(path)
     // NOTE: ignore the config file
     if (path === '.remix.config') {
+      if (cb) cb('change not allowed')
       return false
     }
 
     if (!this.isReadOnly(unprefixedpath)) {
       var exists = storage.exists(unprefixedpath)
       if (!storage.set(unprefixedpath, content)) {
+        if (cb) cb('error updating ' + path)
         return false
       }
       if (!exists) {
@@ -55,9 +57,10 @@ function Files (storage) {
       } else {
         event.trigger('fileChanged', [this.type + '/' + unprefixedpath])
       }
+      if (cb) cb()
       return true
     }
-
+    if (cb) cb('is read only')
     return false
   }