I woke up this morning to the joy of news that the Mibox had received an update. Looking through the comments a few had mentioned that the "storage bug" had been fixed, so I decided it was time to put my 64gb flash drive I had purchased for this exact purpose to work.
I updated the Mibox, then went to settings, storage, my usb drive, and selected move data. The next 40 or so minutes were spent sitting and waiting as the "Moving data to Sandisk USB drive..." screen did its thing. This process does not usually take this long, so I got impatient and backed out.
The drive now showed as "not connected". I then reseated the drive and attempted to restart the process. It started, and then I got "System UI has stopped".
After a quick reboot I attempted the process again, this time removing all apps that were previously installed on the USB drive before hand.
Still no dice. The drive shows as "not connected" every time I try the process.
I'm at a loss. Is this feature STILL not fully fixed? Has anyone successfully done this yet?
Edit: I have found the issue! I was using a file explorer called AnExplorer that was taking default rights of the drive away from the system.
I uninstalled the app and the migration took all of 60 seconds!
DONT USE ANEXPLORER!!!
Figures they'd fix the storage bug the day after I preorder the new Shield TV. I hope it works though. That was the Mi box's biggest problem for me.