Multiple Drive Letters Same Drives

Here is the problem I’m having there are 2 usb drives attached to my HD TV Live, on the computer running Windows 7 it keeps assigning different drive letters to tbe same drives.

Right now I am showing 5 drives V, W, X, Y and Z to the 2 drives attached. It should only show 2.

How do you correct this?

Unmap them.

Right click the drive and select DISCONNECT.