basically, connect wifi first, GS only support WPA2 encrypted wifi network
then open tiny cloud
hopefully you have some exp about linux ,ssh ,that will help you understand GS better
Use windows explorer or samba under linux to copy and paste games to the game folder
like MGBA,MAME,NESTOPIA from default
big advise to go to settings → Update to update the Launcher first ,since shippment started
a lot changed by a lot members of this community
currently
MGBA supports with these gb,gbc,gba,gbx extensions of roms
MAME is zip
NESTOPIA is zip,nes