I had drives maped "J" and "K"  - all my drive letters to I are now full and I cannot access the Dlink 321 and cannot get any jump drives to recognized on the computer.   I want to re-map the dlink drives further down like T or V  - I tried to use the easy search utility and change the drive letter - it asks 
user name - I put "admin"
password - I leave blank
and I get an error failed to map drive.  
Any idea how to remap the drive or removing the mapping so I can do it "fresh" again.  It still works from all my other computers so I think it is the drive letter problem 
Windows 7 on a dell xps machine.
Thank