I have a dell inspiron 11 3000 series (3162).  Every time I try to reset my pc, it says that additional storage space is needed.  I ran the disk cleanup, but there is still not enough space on the hard disk.  I cannot figure out what could possibly be taking up so much space on the hard drive.  Any help is appreciated.

p.s.  I would rather just restore my pc to its factory image, but cannot figure out how to do that.