Windows 10 gives you three built-in ways to back up your files and system

Windows 10 includes File History, System Image, and Reset This PC — three separate backup tools that protect different things. File History saves copies of your documents, photos, and videos to an external drive or network location, and lets you restore old versions if you delete something by mistake. A system image is a complete snapshot of your entire drive, including Windows itself, your programs, and all your settings — useful if your computer stops working and you need to rebuild it from scratch. Reset This PC wipes your computer and reinstalls Windows, keeping or removing your files depending on what you choose.

Most people need File History for everyday protection. System images take longer to create and require more storage space, but they save you from having to reinstall everything if your hard drive fails. This guide covers all three so you can decide which fits your situation.

Key Takeaways

  • File History backs up only your personal files and runs automatically once you set it up, requiring an external drive or network location.
  • A system image captures your entire drive including Windows and all installed programs, but takes significantly more storage space and time to create.
  • You can schedule File History to run hourly, daily, or weekly, and restore individual files or entire folders from any backup point.
  • Both File History and system images require an external drive with enough free space — at least as much as the data you are backing up.
  • Reset This PC removes everything and reinstalls Windows, which is useful for cleaning up a slow computer but is not the same as a backup.

Set up File History for automatic daily backups

File History is the easiest backup to maintain because it runs on a schedule you set once. Plug in an external hard drive or USB drive with at least as much free space as the files you want to back up. Open Settings (press the Windows key and type "settings"), then go to System > About > System protection on the left side. Click Backup settings or search for "File History" directly in the Windows search box.

Click Add a drive and select your external drive from the list. Windows will automatically start backing up your Documents, Desktop, Downloads, Pictures, Music, and Videos folders. To change how often File History runs, click More options and set the frequency — the default is every hour, but you can change it to daily or weekly if you want to save space. You can also exclude folders you do not need backed up, like a large video editing folder, by clicking Exclude these folders.

Leave the external drive plugged in or connected to your network, and File History will run on schedule. If you unplug it for a week, File History will resume backing up the next time you plug it back in. To restore a file, open File History, navigate to the folder where the file was, and click the arrow buttons to browse through backup dates until you find the version you want.

Create a system image for complete drive recovery

A system image is a full copy of your entire drive — Windows, programs, settings, and files all together. If your hard drive fails or Windows stops working, you can restore from the image and be back to exactly where you were. This takes longer to create than File History and requires an external drive with enough space to hold your entire drive (if your C: drive is 500 GB, you need a 500 GB external drive).

Plug in an external drive, then open Control Panel (press the Windows key and type "control panel"). Go to System and Security > Backup and Restore (Windows 7). Click Create a system image on the left. Choose where to save it — select your external drive — and click Next. Windows will show you which drives it will back up (usually just C:). Click Start backup and wait. This can take 30 minutes to several hours depending on how much data you have.

Once the image is created, store the external drive in a safe place. If your computer fails, you will need to boot from a Windows 10 recovery drive (a separate USB you create beforehand) and select Restore from a system image. The process is straightforward but takes time, so only create a system image if you are willing to maintain it — monthly or quarterly is typical.

Understand the difference between File History and system images

File History backs up only your personal files — documents, photos, videos, music, and anything in your user folders. It does not back up Windows itself, your installed programs, or system settings. This means if your hard drive fails completely, you can restore your files but you will need to reinstall Windows and all your programs. File History is fast, uses less storage, and is designed for recovering individual files or folders you accidentally deleted.

A system image backs up everything on your drive, including Windows, every program you installed, and all your settings. If you restore from a system image, your computer will be exactly as it was when you created the image — same programs, same settings, same everything. The trade-off is that system images take much longer to create and restore, and they require a lot of storage space. You also cannot selectively restore just one file from a system image the way you can with File History; you restore the entire drive.

For most people, File History alone is enough. Use a system image only if you have the storage space and you want the ability to completely rebuild your computer without reinstalling Windows and programs.

Check your external drive has enough space

Before you start any backup, make sure your external drive has enough free space. Right-click the external drive in File Explorer and select Properties to see how much space is available. For File History, you need at least as much free space as the size of your Documents, Pictures, Videos, and other user folders combined. For a system image, you need as much free space as your entire C: drive.

If your external drive does not have enough space, you have two options: delete files from the external drive to make room, or buy a larger drive. External drives are inexpensive — a 2 TB drive costs less than $100 and will hold backups for years. If you are backing up a large amount of data, a larger drive gives you room to keep multiple backup versions, which is useful if you need to restore a file from several weeks ago.

Restore files from File History when you need them

To restore a file or folder, open File History by pressing the Windows key and typing "File History". Click Restore personal files. You will see folders for Documents, Desktop, Downloads, Pictures, Music, and Videos. Navigate to the folder where your file was, then use the arrow buttons at the bottom to move through backup dates. When you find the version you want, click it and then click the green restore button (the circular arrow icon). The file will be restored to its original location.

If you want to restore a file to a different location instead of overwriting the original, right-click the file and select Restore to, then choose a new folder. This is useful if you are not sure whether you want to replace the current version. You can also restore an entire folder at once by selecting it and clicking restore.

Schedule regular backups and check they are working

Set a reminder to check your backups every month or two. For File History, open File History settings and look at the date next to Last backup — if it is more than a week old, make sure your external drive is plugged in and File History is still turned on. If you created a system image, create a new one every few months so your backup stays current. The older your backup, the more recent changes you will lose if you need to restore.

Test your backup by actually restoring a file. This sounds unnecessary, but it is the only way to know your backup is working. Restore a file you do not need, or restore it to a different folder, just to confirm the process works. If you wait until your hard drive fails to test your backup, you might discover it did not work — and by then it is too late.

Frequently Asked Questions

Can I back up to a network drive instead of an external USB drive?

Yes. File History can back up to a network location if your computer is connected to a home network or a network drive. In File History settings, click Add a network location instead of Add a drive, then enter the network path. System images must go to an external drive or network location, but network backups are slower than external drives.

What happens if I unplug my external drive before a backup finishes?

File History will pause and resume the next time you plug the drive back in. If you unplug during a system image creation, the image will be incomplete and unusable — you will need to start over. Always let a system image finish completely before unplugging.

Do I need both File History and a system image?

No. File History alone is enough for most people because you can restore your files and reinstall Windows and programs if needed. A system image is only necessary if you want to avoid reinstalling everything, or if you are not comfortable reinstalling Windows.

How long does a system image take to create?

It depends on how much data you have and how fast your external drive is. A typical system image takes 30 minutes to two hours. File History backups are much faster — usually a few minutes for the first backup, then just the changed files on subsequent runs.

Can I delete old File History backups to save space?

Yes. In File History settings, click Advanced settings and scroll down to Cleaning options. You can set File History to automatically delete backups older than a certain number of days, or you can manually delete them. Keep at least a few weeks of backups so you can restore files from further back if needed.