(I am going to assume you meant the F5D8235-4)
Checked the manual and I see no reason why Win7 Pro would make a
difference over the other flavors. You merely attach a USB storage device
to the router, install the "Storage Manager" application to at least 1
computer (so you can configure it and assign a device name (what Windows
would refer to as a "share")) and then "map" drives to it from each PC you
want to access the device via the path \\router_IP\DeviceName (replacing
"router_IP with the router's address, 192.168.2.1 be default) and
"DeviceName" with the share as described above.
See page 22 of the PDF (page 20 of the manual)
http://cache-www.belkin.com/support/dl/man_f5d8235-4_pm00736_0708.pdf