Old post I know but I've had this problem on several of my removeable HDs and finally I managed to remove the 'System Volume Information' folder:
DO NOT DO THIS ON YOUR C: OR YOUR WINDOWS HARDDRIVE!!!!!
Right click desktop and click [New->Shortcut]
Write: cmd.exe
Click [Next] then [Finish]
Right click the cmd.exe icon and click 'Run As Adminstrator"
Now select the external hard drive (F: in my case)
C:>f:
Now do the following (you can copy paste):
F:>attrib -s -h /S /D
F:>attrib -r /S /D
F:>rd "System Volume Information" /S
System Volume Information, Are you sure (Y/N)? y
And you're DONE ;-)