USB hardisk - security settings

[cxxxkies]

Hi,

I’m supporting a small firm and I'm having trouble in setting up the security for the USB hardisk.

Since the company is cost cutting.. they want to use 40GB USB hardisk to be share by 3 users (A,B & C all laptop users with admin rights) where in if user A use the USB, he wont access the the folder of B & C and same as the two users. They also want to setup a quota for each user (10GB)..

OS is under win2K and AD.

I know its hard when all of them have local admin rights.. but is there any other way to secure this?

The other way that im thinking is zip the file with password or look for a utility where in you can put a password into a folder..

any suggestions?