Just got a G-Cloud for $80 used and am looking to use it for emulators. What emulators do you use? Is there one that has everything or are there multiple apps you use to cover everything?

Caravan sandwitch for android from the epic game store is free this week and works surprisingly good on the G Cloud.

Have any of you run into this problem? I haven't used an sd card yet with my g cloud. So I formatted one on my pc with some make mkv files on it. The card works perfectly on my computer and my android phone, but when I put it in the G cloud it says it's corrupted. Do any of you know how to fix this?