Quote Originally Posted by SurvivorOfTheApocalypse View Post
(Sorry I didn't get to this in a while.)
I just tried opening an ISO file along with the cores and everything. The emulator is still saying that it couldn't load the content. Do I have to put the ISO file in a RetroArch system folder or something like what I had to do with the BIOS?
Check to see if RetroArch is detecting the Bios files, load the core and go to information>core information and see if it says PRESENT or MISSING.

What core/system and file type are you trying to run?