No permission to access my folders

Sam - Jan 16, 2015 at 01:18 AM

I downloaded a file, but it was showing up as a .sit file and I couldn't view it (I'm running Mavericks on Mac). I downloaded an expander called Stuffit but I still cannot open the file. The Stuffit application prompted me with a message saying that I cannot move the new .iso file into my Documents folder, or any other folder I try, because I "don't have permission to access Documents." Thoughts?