It’s a fairly easy process to complete and, as long as you remember your password, it proves incredibly effective. To encrypt a hard drive you’ll need to ensure it’s formatted as a Mac OS Journaled volume so be sure to back up your data and reformat if necessary. Once you’ve done that you’re ready to get started on the straightforward encryption process. Whatever you do, make sure you don’t ever forget that all-important password!
Step 1: All in context
With the drive you want to use mounted to your desktop, right-click on your drive with already encrypted, you’ll see Decrypt “Drive Name” instead.
Step 2: What’s the password?
In the dialog that appears on screen, enter the password you’d like to its icon and choose Encrypt “Drive Name” from the context menu. If it’s secure, repeat it to confirm and enter a password hint. Hit Encrypt Disk then wait for Finder to do all of the legwork.
Step 3: Test it out
You may have to leave your drive plugged in for a while to encrypt (big drives will need at least half an hour). Once it’s done you can eject it and remount it to test. You’ll see a warning if you eject the drive too early.
Step 4: Undo it
If you want to stop password protection on your drive, right-click on its icon and click Decrypt “Drive Name” from the context menu. Again, this may take some time so be patient and don’t eject it until it’s done.
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