I'm running SBS 2008 R2 with all Win 7 clients logging in as restricted users; none of them have local administrator access. Anytime someone uses an external USB drive, they cannot create files on the root of the drive. They can however create folders on the root and then store files within those folders.
The local hard-drive is split into 3 partitions. The C: partition has the same write-restrictions on the root which I would expect. The other two partitions have no restrictions at all.
So, how do I allow these users full access to their external USB drives?
(also, I've tested this with brand new drives as well, so I'm pretty sure that it's not an issue of pre-existing ownership permissions on the drives.)