Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do NOT buy!

I backed up all of my .mp3 files, as well as many important files onto this product. When I got a new computer, I tried to access the files on this external hard drive and couldn't because I got a message saying the drive was not formatted. It IS formatted, by the same OS (Windows XP)! Now I cannot retrieve all the important files I had saved on this product.Do not buy this product!!!