I'm trying to move everything from my windows version of RPCS3 to my Steam Deck. I use EmuDeck for ease of use but I don't have to. I tried to copy and overwrite everything but the .exe to the main directory EmuDeck set up but that didn't work. I had to troubleshoot a lot on the windows version and would love to save some time by using either EmuDeck or my windows settings. Thank you!
No support is given for unofficial builds such as the one EmuDeck uses, which doesn't even use the same paths.
After you're using the official build, you just have to place your RPCS3 folders in .config/rpcs3 or .cache/rpcs3, depending on the folder type. cache directory is for the emulator caches, and .config is for all the emulator data that's not considered a cache. You'll see what folders go where after you open RPCS3 once and it populates the folders there.