OK FYI: I picked up a 500GB Maxtor USB drive but it was preformatted with NTFS. I found a great site that has a little program to format a drive with FAT32 and step by step instructions.http://www.ridgecrop.demon.co.uk/ind...at32format.htm
Basically you have to delete the partition on your new drive. Then from Windows Disc Manager you assign a drive letter but do not format the drive. Once you do that, you open the little program from a dos prompt and tell it to format your disc. Boom!
As for the Opus, you just turn it on, and then plug in the USB drive which will show up on the main menu. Then go to your albums view, mark all of them, add them to a list and choose the USB drive as the list to add them to just like as if you were making a playlist. I'm in the process of copying my entire library to the USB drive now.
I'll let you know later my experience about reading the library into iTunes. I REALLY hope it works!