Thanks, fixed it... I had to buy new external hard drive then convert the new one and drag the files from old one, one folder at a time... glad they came out with usb 3.0 now with 1.5 tb thanks... also I formatted the entire hard drive (old one) to get it working again...

The thing is that when I first bought it, I forgot to format it, though the pc still reads it even if it's not formatted. I might use this on this new computer only so it doesn't mess up again ...