What would be a more secure way to encrypt files using TrueCrypt 7.1a. The is an airgapped computer (wifi, bluetooth, speakers and mic removed too). The encrypted files will be on an external drive in either setup and not on the system's HDD.
An FDE TrueCrypt notebook running Windows.
A MacBook running OSX but without TrueCrypt FDE (not available) but running TrueCrypt in the OS to encrypt the files on an external drive.
The second setup would be more user friendly to me but are there any dangers in this setup if the encrypted drive is unmounted. I'm afraid of leaving keys or info behind that would compromise the external TrueCrypt encrypted drive.