usb card for ultra 5

[Paolino]

Reading the hardware notes I can't guess which card I should buy.
I need it for usb disk storage.Is the list under umct module the right 
one? Is it partial ?
I was looking at sitecom cards on e-bay. 
http://cgi.ebay.com/USB-2-0-PCI-card-4-port-Brand-New-10-yr-warrantee_W0QQitemZ6844055318QQcategoryZ90718QQssPageNameZWD1VQQrdZ1QQcmdZViewItem
is one of the possible cards mentioned under Sitecom usb-232 ?
The 232 is confusing me.

Thanks a lot for your job.

Paolino