How to change the default roms folder (to internal storage) if the TF2/EXT slot on RG280V is physically defective?

[aliquantulus]

What happened?

I received my first Anbernic device this week, but no matter what I do, the secondary TF2/EXT microSD slot on my RG280V seems to be defective. I have tried 3 different software packages to format the card to FAT32 with no label (guiformat.exe, Raspberry Pi Imager and GParted) and 4 different microSD cards (ranging from 16 GB to 128 GB), but no matter what I do, I can only see the mmcblk0 (nothing happens in dmesg (via USB 10.1.1.2.) and lsblk only shows mmcblk0 and it's two partitions (when using Adam image 2.1 and 1.6). I get the exact same results from the slot when I boot the original Anbernic Kioxia SD-card. I have reached out to Anbernic, but if I could get games to be scanned from slot1 I would consider keeping this defective device (at the moment I can manually search for roms via retroarch which is the only "game" found, but that's a lot more steps to start gaming each time than just having the device scan the correct folder and finding the games that way).

Device

RG280V

Version

v2.1