How to: Unmount a compressed drive.
Solution:
Open 'DriveSpace' in 'System Tools', select the drive to be mounted and select 'Unmount...' from the 'Advanced' menu.
1) Click the 'Start' button to display the 'Start' menu and select 'Programs'.
Select 'Programs'
2) Select 'Accessories'.
3) Select the 'System Tools' menu and select 'DriveSpace'.
'DriveSpace' from menu
4) Select the drive from the 'Drive on this computer' list.
Drives
5) Select the 'Advanced' menu and select 'Unmount...'.
6) Click 'OK' when informed that the drive has been unmounted.