Encrypt an External Disk
We strongly recommend you use hardware-encrypted external hard drives. They are easy to use, work across platforms, and remove the complexity of software encryption. For links to recommended drives, see this page:
Symantec PGP may be used to encrypt both internal and external disks.
- Mac Symantec Encryption Desktop (PGP) Encrypt External Disk
- Windows Symantec Encryption Desktop (PGP) Encrypt External Disk
Apple FileVault 2
- Mac OSX 10.7+ https://support.apple.com/kb/PH11430