Hi. I am constantly running out of space on my surface pro 64 gb. When I check the size of my folders of course windows and programs take up a lot of space, but my user folder uses 24 gb. I would like to whittle that down, but I can't figure out how it's taking up that much space. When I look at the individual folders they add up to only about 3 gb, leaving 21 gb unaccounted for. I am going to get a card to expand the memory, but I need to use it in the meantime, and even if I do I don't want to keep getting error messages that my hd is running out of space for mysterious reasons. Thanks.