Looking for help with U5pvr slim

Looking for help with U5pvr slim, many differnt questions...

I have read everything i can find on it but not found any answers.

Claims to have 16gb emmc but i can only find 4gb.

And was looking for a recommandition on what firmware to use.

Its has Android 5.1.1 dated 2017.07.31

If i do the update atv5.1 to atv7.0 then it will not take any other updates,

and i see there are alot of them.

Any help or point me where to go read would be nice.

Thanks...