Surely by now you have read the SD card Guide, 
and other posts that indicate in no uncertain terms that using internal storage for the SD card if fraught with problems and if i go by anecdote on other \Android phones too.
Surely by now you have read the SD card Guide, and other posts that indicate in no uncertain terms that using internal storage for the SD card if fraught with problems and if i go by anecdote on other \Android phones too.