

Very nice. Also thanks for reporting back. Yes, in Linux filenames and extensions are case sensitive, unlike in Windows. Most programs (including Windows itself) treat lowercase and uppercase in filenames as the same thing. And because most developers and users are on Windows, they are used to it this way. So on Linux we have to take extra care and in some cases rename files.
Next would be to learn how to swap a Disc when the game asks to. I mean for games that are multi-disc, in case you play other games too: https://docs.libretro.com/guides/disc-swapping/
And I also recommend the official forum of RetroArch too, to ask questions if you have any (I am there too ;-)): https://forums.libretro.com/ Because there are lot of engaged users who know RetroArch pretty good and even developers of RetroArch and some cores respond and help there too. Have fun with Final Fantasy Tactics (one of my alltime favorites). BTW the game was announced to have a remaster.
Lemmy is a far better platform for discussions than Discourse in my opinion. The tree like sub-reply threads in each post (the Reddit concept) is preferable over a single thread of replies. You don’t need to cross quote and for readers no need to read the quote to see who and to what the reply is about. I don’t like Discourse discussion platforms at all.
However, Discourse has a few features that fits well for a discussion platform. I like the tags and Trust system of it.