When I first built my PC, I used only a Seagate 1TB HDD, but I later upgraded to a 240gbSSD with plans to use the HDD for mass storage. Now I'm trying to remove unneeded files like the old windows installation from my HDD without formatting it, because I've got over 300GB of personal files, but I've got no external hard drive big enough to fit it all. Whenever I try to delete something from it that windows sees as "Important", it gives me a message saying I need permission from "desktop-hft01d9\administrator", But when I go into the security tab and give myself Admin Privileges over the drive, windows gives me an error and excludes windows folders. Any Ideas?