I need help as my external hard drive with precious and valuable data is not mounting properly on my computer. I do see it on My Desktop but the icon was non-clickable, even if it was, it will ask to format my drive. I used to use chkdsk to mount it back but now, it's not working at all. I did a chkdsk /r and chkdsk /f. It would keep failing during 77% progress. Are there any other possible ways to recover my hard drive?