Make external hard drive password protected mac

Password Protecting External Hard Drive on Mac

This will, of course, erase all existing data on the drive. If you frequently access your external drive on both Windows and Mac, the above solution might not be convenient for you. Instead, you can create an encrypted disk image and store it on your external drive. This will leave the drive accessible on both Windows and Mac computers, but the encrypted disk image can only be mounted on a Mac with the correct password to access its contents.

This is the advantage of sparse bundle disk image. As you mount the disk from the image and save files into it, the image size will automatically increase to contain the files.


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So even if you create a disk image of the same size as your external hard disk, the actual size of the disk image will correspond to the size of the data stored in it. Once the encrypted disk image has been created, the next step is to mount it on Mac as a virtual disk. To mount it, just double click on the disk image from your external hard drive.

You will be prompted to enter the password. After the disk is mounted, you can use it as just another disk drive and copy data from and to it.

Password Protect External Hard Drive on Windows

The image file dynamically increases in size as you copy contents into the mounted disk. If you want to increase the capacity of the virtual disk, you need to resize the disk image. The following steps will guide you to do so.

How to Password Protect Folders in MacOS

If you are aware of such solutions that were not mentioned here, let us know about it in the comments below. This content is blocked.

Require a Password to Access External Drives with an Encrypted Partition

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