Lets take a look at how we can hide these drives.
Note: This will completely hide the drive, even from you.
You’ll have to open up disk management to un-hide it.
When the computer management MMC opens, double choose the storage option.
Now choose to kick off the disk management snap-in.
Right press it and choose the Change Drive Letter and Paths.. option from the context menu.
When the dialog box pops up hit the remove button so that it does not have a drive letter.