How to Back Up a Computer to an External Hard Drive

How to Back Up a Computer to an External Hard Drive

The Download

  • Back up your files to an external hard drive using File History or Backup settings on Windows.
  • Make a full backup of your system to save everything, including Windows and your settings.

This article explains how to back up your Windows PC, partially or completely, and is applicable to both Windows 11 and 10.

How to Make a Partial Backup of Your Computer

A partial backup of your Windows computer won’t save your operating system settings, but it will keep your important files if you ever need to reinstall Windows.

If you’re focused on backing up specific files and folders, you can automatically save them to an external hard drive at regular intervals you select.

  1. Connect the external drive to your computer, then select the Start menu. In Windows 11, type file history and select File History. In Windows 10, type backup and select Backup settings.

  2. Select Add a drive to choose the external hard drive you want to use for your file history backups.

  3. Doing this opens a Select a drive popup listing all external drives connected to your computer. Select the external drive where you want to back up your important files and folders.

  4. You’ll see Automatically back up my files enabled. This uses a default list of files and folders that most users prefer to back up. To add more files and folders, select More options below the toggle.

  5. Review the folders under Back up these folders. If any are missing from the list, select Add a folder and then browse and choose the additional folders you want to include.

    If there are any folders listed that you don’t want to include, select it and then select Remove to remove that folder from the list.

How to Make a System Backup of Your Computer

A full system backup requires significantly more space than a partial backup, which only covers files and folders. The space needed depends on your system files; therefore, clear out the cache and log files to lessen space requirements. Expect to use over 200 GB for this backup, necessitating an external hard drive with at least 250 GB of free space.

A complete backup of your Windows 10 system is known as a “system image.” You can save this to an external hard drive for safekeeping away from your computer’s internal drive. If recovery is needed, use this system image to restore your operating system and settings.

  1. In the search bar, type control panel and select the Control Panel app.

  2. Select Backup and Restore (Windows 7).

  3. From the left pane, select Create a system image.

  4. In the Create a system image pop-up window, select your attached external hard drive in the On a hard disk drop-down list.

  5. In the next window, you’ll see a list of system partitions that will be backed up as part of the system backup on the external hard drive. Select Start backup to begin the backup process.

  6. Depending on the size of your system, the entire backup process may take a while. Give it time and check back later. Once the backup is complete, you can disconnect the external drive and store it in a safe location.

Types of Computer Backups

Depending on your needs, there are two types of backups you can perform.

  • Partial Backup: This is where you only back up important files and folders and nothing else.
  • Full Backup: Take a complete “clone” of your entire system, including the OS settings, essential files, and everything else on your hard drive.

FAQ

  • How can I use an external hard drive for backup and storage?

    If you have enough space on your external drive, it’s possible to use the same device for full computer backups and storing specific files. Otherwise, you may want to consider separate hard drives: one drive for moving files to save space on your computer and the other for backups. On Macs using Time Machine, you’ll need to create a new APFS volume on the external hard drive to use part of it for backups and another portion for other file storage. 

  • How do I back up my Mac to an external hard drive?

    Use Time Machine to back up your Mac to an external drive. Connect the drive and set it as your preferred backup drive from System Preferences > Time Machine > Select Backup Disk. From there, you can choose manual or automated backups that start at a specific interval when you connect the external drive to your Mac. To back up essential files, manually move them to your external drive or use iCloud.

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