I was able to use the HDD previously and put some files in it but suddenly after a few days it won't work. It can be read on the PC but if you open it, it makes the PC lag. Same for the Defragment and Disk Management , it won't open unless you remove the external HDD. I tried this on 2 other PCs but it is no use. Also used another cable. The last thing I tried was plugging it on my tv and it works fine. Is it some kind of windows compatibility problem? I hope this narrows down the possibilities of the problem. Please help, thank you so much in advanced!!