HaloMods "Classic" Read-only Archive

Whenever I try to start up my Photoshop, it finishes the splash screen then I get an exception error "Scratch Discs Full" and then Photoshop closes. Does anyone know how to fix this.

That happened to me for a while, what you have to do is go into photoshop and changed your preferences but if it is closing then you have to clear up some space on your HD.