yene19 :
I own a WD portable external Hard drive but after plugging it in on my friends computer I suddenly can't see it under my computer. I can see it in my device manager though I can't initialize it. I can't even partition it. It appears to be zero bites. I had a lot of important files in my Hard drive. I really need your help.
Hopefully I'm wrong, but it seems that the file system has failed. When you look at the drive's properties, what file system does it say it is using (ex., NTFS, FAT32, RAW)?
If it is still using NTFS/FAT32 I would recommend using chkdsk from command prompt to repair the file system, it is RAW or unknown, we will need to tackle the problem in other ways as data recovery will be a bit more complicated.
Also, just to clarify, does this occur under every computer you've plugged it into? Have you tried multiple OSes (though honestly if it is anything after XP it should read the same)? When it was unplugged before being inserted into your friends PC, was it unmounted properly (i.e., not just unplugged, but using safe device removal)?