android4.4 Use the Go backup solution.

This is a created article in which the information may have evolved or changed.

Reference: http://apk.tw/thread-550590-1-1.html

After root, use tools such as Root Explorer ...
1. The first step is to enter the "/system/etc/permissions" catalogue.

1. To find the Platform.xml file, long press the file to open it in a text editor.

2. Find "name=" Android.permission.WRITE_EXTERNAL_STORAGE "" This line, add "below.

3. Re-start the file after the archive
   This go backup is still not available.

Another step: Modify the/mnt/media_rw/directory permission to 777.

The last step took a lot of effort to solve.