I didn’t do any fancy mounting, as far as I can remember. I think it really was just a matter of copying the directories to my SD card and replacing the directories on the deck with links to the ones I copied to the card.
I’ll take a look at what I did the next time I get the deck out and let you know
Is the game data actually in the portmaster directory when you browse the SD card on a PC? I know many pm games require copyrighted data to run (half life for example)
A lot of these stock OSes are crudely translated from Chinese perhaps “ready to play” isn’t literal.
I’ve gotten several portmaster games working on ArkOS on my Anbernic devices, check their wiki it’s probably similar to the setup required on the anbernic stock OS