Hi, I'm having issues with scratch disks are full and PS using mass amounts of disk space just to do simple tasks. Like to drag out a circle on a blank document it will fill up 150gig on my SSD C: as well as filling filling up 250gig on my D: and then it will even try to use my external usb3.0 2TB drive. I know PS need a good amount of space to run properly, but this seems a bit ridiculous. The program had been use able in the past but it's pretty much useless now. I'm using a core i5 with 20gig or ram 150gig free SSD space 250gig of normal hard drive space and over a terabyte on external HDD.
Problem solved. when opening new documents inches was selected instead of pixels, so I was ipening a 1000inch document with 300 pixels per inch. Needless to say it didn't like it too much.