Are your hard drives set to slave?
Well they're SATA and in my P6X59D BIO's there is no "master" "slave". You just set the drives to 1, 2, 3, 4.
Here is a screen shot of disk management.
And what exactly do you mean when you say "Write a file"?
If I get into a program. Make something and then try to save it to G:... i get an error.
Are you putting in files like music, videos, pictures, documents, and programs?
Movies, Images, NFO files.
If all of your hard drives are installed in your desktop, why have them shared?
Sharing them to a media player, just like I did in XP. Only never had a problem with XP.
Did you try taking ownership of G: ?
I'm not sure what you mean by that. Any directions? There is only one user and I'm logged in as Administrator.