So, I finally found the problem. I, the user, didn't have permission to modify the garrysmod folder.

As I said, I have a windows copy of Garry's mod on my SD card for compilation. The problem was that I copied it over from another device, so I wasn't the owner of that folder. Furthermore, no-one BUT the owner had permission to modify it either.

What I ended up doing was copying the contents of my SD card to a folder on the desktop (making me the owner of those files), formatting my SD card through steam, and moving everything back over.

Linux file permissions cause me so many problems...

引用自 Dr. Boomer：

maybe you should enter desktop mod, I can't really tell, don't have steamdeck sry

I am in desktop mode

Hello! Due to odd circumstances, I am using a Steam deck for blender modeling.

I haven't had any issues so far with exporting my SMDs and such, but I cannot QC compile my project. Whenever I do, I get the error:
Error opening E:\GarrysMod\garrysmod\models/props\tumbler.mdl! (Check for write enable)

I'm using a windows version of Garry's Mod on my SD card for the compilation, since the Deck itself has the Linux version without studiomdl.exe. While I can compile it without Blender on another machine, I would rather be able to make, export, compile, and test on the same machine. What do I do?