Since moving to Windows 8, are your USB connected drives appearing in Windows like they did before in Windows Vista?
Open My Computer and right click on the external USB drive and click on the Share tab, share the drive letter, give the Share user access, click under the permissions tab and again, give the Share user access.
To confirm what is being shared, right click on My Computer and chose Manage to open the computer management window. In here, on the left click on Shared Folders and expand, and below that select Shares. It should show all of your shared folders that should be visible from the WDTV.
