What Is Disk Backup?

Disk Backup is used to back up all partitions including the system partition, boot partition, and data partitions on the specific disk you select to an image file. That means if you back up a system disk via Disk Backup, after restoring it, the system can boot normally.

However, Disk Backup is different from System Backup, because System Backup backs up system partition and system-related partitions only (boot partition, system reserved partition, etc).

There is no need to run system backup if you have created a disk backup.

How to Back up Disks in AOMEI Backupper

AOMEI Backupper, the all-around disk backup software, can back up MBR disks, GPT disks, external hard drives, USB disks, and other storage devices. For regular backup, it provides users with the function of incremental and differential backup mode to improve the backup efficiency and reduce the storage space required by the generated image file.

You can do free disk backup with the free version of AOMEI Backupper - AOMEI Backupper Standard. Learn the detailed steps below. Before starting the operation, download, install and launch AOMEI Backupper.

Download Freeware Win 11/10/8.1/8/7/XP
Secure Download

Here are the detailed steps about how to back up disks:

1. In the left tab page, select Backup and then select Disk Backup.

Disk Backup

2. Click "Add Disk". Also, you can choose to name this backup using the "Task Name" field to help you distinguish it from other backups.

Add Disk

3. In the popup window, select the source disks that you want to back up and you can add several disks to be backed up via Disk Backup in a single backup operation..

Select Disk

Tip: Even though you can add several disks to be included in the backup, you need to restore these disks one by one. Moreover, it is impossible to restore several disks' included in an image file to one larger disk. 

4. Click where the arrow point to select a destination path to store the image file.

Select Destination

5. Click the Start Backup button and wait for the process to complete.

Start Backup

While a backup is running, you can click an icon in the lower-left corner to set to Shut down/Restart/Hibernate/Sleep PC after backup completion. Please tick the box and then click "OK".

Disk Backup Shutdown

When the backup is running, you can also click the underlined sentence to check the backup process in detail.

Disk Backup Process

And, please kindly wait for the backup process to complete and then click the "Finish" button.

Disk Backup Complete

As a result, you can check there is a backup image (.adi) generated in the destination location.

Disk Backup Result

For more detailed info about how Disk Backup works, please refer to Disk backup.


1. If you would like to restore a disk backup image, please use the feature "Disk Restore".

2. If you would like to view the contents of disk backup without restoring a backup image or you would like to copy some files and folders in the backup image, you can use the feature "Explore Image" to mount the image.

  • For more advanced options for the current backup task, please refer to Backup Options, Schedule Backup, and Backup Scheme.

  • When performing Disk Backup, AOMEI Backupper allows you to back up several disks each time, so you need to confirm that the destination must have sufficient space to contain the image file of all these disks. When performing the restore, you need to restore the corresponding disks one by one. Please note the more data to be backed up, the more time it will take.

  • For dynamic disk, Disk Backup is not supported in all versions and if you want to back up it, please use System Backup or Partition Backup.

  • AOMEI Backupper Standard version does not support any operations on the dynamic disks.

  • For encrypted disks, Backupper uses the sector by sector method to back up the disk by default.

  • If there are non-NTFS or FAT32 partitions on the disk, Backupper uses the sector by sector method to back up the partitions.

  • Backupper currently doesn't support backing up the disk with 4096 bytes/sector. But, you can save the image file to 4096 bytes/sector disks.