That's good news, does disk management give the removable drive a letter?

go to the command prompt and type

cacls /T /E /R Everyone [drive letter]:

Cacls will remove all permissions for the 'Everyone' group in all files and subfolders of the [drive letter]:\ drive

where you see drive letter, put in the drive letter you see for your removable media... don't include the brackets, it should look like this:
>cacls /t /e /r everyone N:

where N: is the drive letter you see in disk management

then type:
>cacls /t /e /f everyone N:

this replaces the /r "remove all permissions" with /f "full controll" for the everyone group.