Hi MPK I'm also facing the same issue. Searched some websites also but haven't found any clue as to solve this internal storage problem of mibox. Another different forum posted the dude using multiple apps to try move apps to external storage but can't get it to work also.

This is what he said

"Hey guys,

I have Kodi (XBMC) installed on my Mi box enhanced (4K, 2GB ram). It uses about 1GB of the internal SD for userdata, which leaves almost no free memory.

Since I also want to install some games, I've tried to enlarge the internal SD by trying to move data to the external SD. I've used:
* Link2SD: works, but not possible to move data from internal sd to external sd, so useless in this case...
* Mount2SD: not working, shows external SD as not mounted
* Internal 2 External: not working at all
* Foldermount: not working
* manually editting vold.fstab: not working, no sdcard line

Did anybody try to solve this problem with success and how?

Thanks!"
Hopefully someone can help with this issue.

What files you manage to found? Is it regarding Kodi?

I have Kodi (XBMC) installed on my Mi box enhanced (4K, 2GB ram). It uses about 1GB of the internal SD for userdata, which leaves almost no free memory.

Did anybody try to solve this problem with success and how?

Thanks!"
Hopefully someone can help with this issue.

Wanna ask... If buy mibox d then not necessarily to have a smart tv right?

what is the different between MiBox and MiBox mini?

the biggest and important difference, is the absent of any peripheral port in mibox mini.no usb port,no mini usb port, no sd card slot (except one HDMI port to ur TV). thus u are depending on its wireless and bluetooth capabilites to connect to other devices/installing app.
if u r pretty handy with android device,know a little bit of Mandarin, it should be ok. u have to remember too, that it is quite difficult to install a working google play store on any mibox. u might have to use 3rd party store to install any app.

hi guys any apps for watching latest movie?

I installed Taiwan Good app.
One of the program is supposedly available in two languages - Mandarin & Hokkien.

Please may I know how to switch between the languages?

Hi can you share the link or the complete name for this "Taiwan Good app"?

hi guys any apps for watching latest movie?

Tried side loading this app into my mibox.
The app detected that i do not have google play services and FC.