![]() While encrypted, the file is no longer readable through normal means. ![]() When a file has been encrypted, an encoding algorithm has been applied to it which modifies the data until a decryption key has been used. If you’ve found yourself in a situation where you need to recover lost files from an encrypted/password-locked USB drive, the instructions provided in this article are just what you need to get them back regardless of if you’re using Windows or macOS. Why? Because files stored on an encrypted (password-protected) USB drive can’t be accessed by anyone unless the USB drive is decrypted and unlocked first. If you at step 3 above you get an error message saying "A GUID Partitioning Table (GPT) partitioning scheme is required.", please go to this Knowledge Base article for a resolution.Data encryption is among the most effective techniques for protecting confidential files, but it can become a double-edged sword when recovering lost data. If you would like to skip this step when accessing this disk on your primary Mac, you can choose to select the checkbox to Remember this password in my keychain. Once encrypted, when you next plug your external drive in, you will be prompted to enter the password you created earlier and click Unlock in order to unlock the disk.The best way to tell that the encryption is taking place is to watch the activity indicator light for your disk, if it has one, and if it is blinking do not disconnect it as the encryption process is likely still in progress. Result: The external disk will begin to encrypt, however, there is no progress bar to show you the process of the encryption, which could take as few as a couple of minutes up to several hours for large disks. When prompted to create an encryption password, use a strong password and enter it twice, along with a password hint, and click Encrypt Disk. ![]() Right-click (or two-finger click, or control-click) on this disk in order to bring up a contextual menu, and then select Encrypt " External Drive Name ".Open a new Finder window and select the external drive you would like to encrypt from the panel on the left, under Devices. ![]() Use the following steps in OS X Mountain Lion (10.8) and up to encrypt (and decrypt) external disks, including flash drives, from the Finder. Enable FileVault on External Disks in OS X 10.8 and Up ![]()
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