I don't know what hardware your PC has, but if it has a DVD burner I would suggest burning files to DVDs. What Operating system do you use? Windows 95, 98, 2000 (ME), XP, Vista, or Se7en?
If you use Vista or Se7en then windows has burning software built-in. All you would need to do is drag and drop files to the disk but beware: once you eject the disc, that's all you can burn to it. It's a one-time action of storing that data.
Once the data is stored on the disc and you've ejected it, you can delete it from your computer. Might I suggest backing up your pictures or documents in this fashion?
EDIT: I forgot to mention that you need to buy DVDR discs to do this. They're fairly cheap these days and I've seen a 100 pack of Verbatim discs (supposedly the best brand) go for $30. It stores 4.7 GB on each disc x 100 discs = 470 GB, aka more space than you'd probably use, for $30.