Cant mount to drive F

[snatchric]

I need help. I cannot mount to the F drive on my computer. The only drives i can mount to are I-Z plzz help. I need to mount to the F drive in order to play my game.

[oder2]

It means that the other letters (including F) are already occupied for something else. Unassign F from device it is currently assigned to and it will become available to DT.
Note: A memory card reader may reserve drive letters but they are not visible in Computer until you insert a memory card. After that you will be able to change assignments in Disk Management and leave F free.