The contents of the disk will be encrypted, and without the password, no one can access them. How to encrypt a USB/external hard drive in Finder optionįinder uses XTS-AES encryption, allowing you to encrypt USB disks without erasing data. Click the link below to get a step-by-step guide on how to do that: You can encrypt an external hard drive on Mac without erasing using the Disk Utility or Finder options.
We’ll show you how to use Mac’s internal encryption program to encrypt a USB flash drive without losing data.
