Where have all my kits gone?!

I have a lot of free templates to use for digital scrapbooking and I was very excited to use them. I have stored most of my downloaded digital scrapbooking kits in my brother's HD. When I was about to scrap last night, I was surprised to find that all of my kits were gone! even the photos I saved that I'm planning to use for my scrap! I'm praying and hoping that these files were still in our old computer. I am about to find out later when I get home. Grrrrrr!!!!