i have a 80 gig hardrive, bu tmy comp, dell xps 400 keeps tellin me i got 70.6 total gigs left wtf?
i do u se hibernate a lot but i dont think this is a problem
defragmenting organizes the files of your drive in a logical sequence and also brings them back together. Over time files get fragmented all over your drive causing your drive to work harder and longer when reading your files. This can slow down your system considerably.