I just got a new 2tb hdd by WD for my new PC and was able to assign it a drive letter and copy files on it, but after the 3rd boot up it doesn't appear in windows anymore. I tried checking the disk manager, but it doesn't appear there anymore, but it appears in bios? I also tried using a hdd adapter and connected to other PCs, I get the same result. Can anybody help me out, I really don't want to lose my files.