Custom textures on Emudeck through SD Card?

[RagahRagah]

I've read several different guides, depending on what emulators you are using and what not and have been frustrated, I think mainly because most guides assume you are running on the Deck itself rather than an SD card, the latter of which is my case. I see so much conflicting information on where to put this stuff, and have found no FAQS for any specific emulator at all (let alone through Emudeck specifically) for doing this on the Steamdeck. Especially funny seeing as there is a texturepack AND Hdpack folder at the root of the Emulation folder. I followed the following guide to the exact latter on my SD card to no avail for an N64 game, on the Mupen64Plus-Next core:

https://retrodeck.readthedocs.io/en/latest/wiki_emulator_guides/retroarch/retroarch-mupen64plus-texture-pack/

No luck on getting textures to work for ANYTHING (Tried N64, PS2, Duckstatiom, Flycast, several cores in Retroarch) except on Dolphin. I'm thinking running off the sd card has to be making a difference because no guide I've followed for any of these systems/emulators has worked. Any ideas?