Windows 10 has two built-in backup tools that work differently
Windows 10 comes with two separate backup systems, and which one you use depends on what you're trying to protect. File History backs up your personal files (documents, photos, videos, music) to an external drive or network location, and lets you restore individual files or folders if they get deleted or corrupted. System Image creates a complete snapshot of your entire drive—operating system, programs, settings, and all—so you can restore your computer to that exact state if something goes seriously wrong.
Most people should use File History for everyday protection. A system image is useful as a safety net before major changes (like a Windows update) or if you want to clone your setup to a new computer, but it takes up a lot of space and takes longer to create.
Key Takeaways
- File History backs up only your personal files and runs automatically once you set it up with an external drive or network location.
- System Image creates a complete copy of your entire drive and is best used before major changes or as a full-computer recovery tool.
- You need an external hard drive or network storage for either backup method—cloud storage like OneDrive is separate from these tools.
- File History can restore individual files from any point in time, while a system image restores everything at once to the moment you created it.
- Windows 10 does not automatically back up to the cloud; you must manually set up File History or use a third-party service.
How to set up File History for your personal files
File History is the simpler of the two options and is what most people need. Plug in an external hard drive or connect to a network drive, then open Settings (press Windows key + I), go to Update & Security, and click Backup on the left side. Click Add a drive and select your external drive from the list.
Once you've chosen a drive, File History turns on automatically and backs up your files every hour. You'll see a list of folders it's protecting—typically your Documents, Pictures, Music, Videos, and Desktop. If you want to exclude a folder or add a network location instead of an external drive, click More options to adjust what gets backed up and how often.
File History keeps multiple versions of each file, so you can restore a document from last week, last month, or whenever you last changed it. To restore a file, go back to Settings > Update & Security > Backup, click More options, scroll down, and click Restore files from a current backup. A window opens showing your backed-up folders; navigate to the file you need, select it, and click the restore button.
Creating a system image for complete computer recovery
A system image is a full copy of your drive and takes significantly more space—usually 30 to 100 gigabytes depending on how much you have installed. You'll need an external drive large enough to hold it, or you can save it to a network location. System images are most useful before you install major updates, change hardware, or if you want to keep an exact backup of your working setup.
To create a system image, open Control Panel (search for it in the Windows search box), go to System and Security, then click Backup and Restore (Windows 7). On the left side, click Create a system image. Choose where to save it—your external drive or a network location—and Windows will walk you through selecting which drives to include. The backup process can take 30 minutes to several hours depending on your drive size and computer speed.
To restore from a system image, you typically need to boot from a recovery drive or Windows installation media. This is more complex than restoring individual files, so only use a system image if you're comfortable with recovery procedures or if you're doing it before a major change you can plan for.
Using OneDrive for cloud backup of important files
OneDrive is Microsoft's cloud storage service and works differently from File History. Instead of creating a backup, OneDrive syncs your files to the cloud in real time, so you can access them from any device. If you delete a file on your computer, it's also deleted from OneDrive unless you recover it from the OneDrive recycle bin within 93 days.
OneDrive comes with a free 5 gigabyte account and is built into Windows 10. To use it, click the OneDrive icon in your system tray (bottom right corner) and sign in with your Microsoft account. You can then drag files into your OneDrive folder, and they'll sync to the cloud automatically. OneDrive is useful for documents and photos you want to access everywhere, but it's not a replacement for File History—it's a sync service, not a backup system.
What to do if your external drive fails or gets lost
If your backup drive stops working or goes missing, you lose the backups stored on it. This is why many people use more than one backup method: File History to an external drive at home, plus OneDrive for important documents, plus a system image stored somewhere separate. The more copies you have in different locations, the safer your data is.
If a backup drive fails, you can try connecting it to another computer to see if it's recognized. If the drive itself is damaged, data recovery services exist but are expensive. The best protection is to keep at least two separate backups and test them occasionally by restoring a file to make sure they actually work.
Checking that your backups are actually working
A backup that's never been tested is just hope. Once you've set up File History, wait a few days, then deliberately restore a file to a different location to confirm it worked. Go to Settings > Update & Security > Backup > More options > Restore files from a current backup, pick a file you know exists, and restore it to your Desktop or a test folder. If the file appears, your backup is working.
For a system image, you don't need to test it by actually restoring your whole computer, but you should at least verify that the backup file exists on your external drive and that the drive is readable. Open File Explorer, navigate to your external drive, and look for a folder called WindowsImageBackup—if it's there and has a recent date, your system image was created successfully.
Frequently Asked Questions
Can I use an external drive for both File History and a system image?
Yes. File History and system images can coexist on the same external drive as long as the drive is large enough. A system image typically takes 30 to 100 gigabytes, and File History will use additional space for multiple versions of your files. A 1 or 2 terabyte external drive gives you room for both without running out of space.
What happens if I unplug my backup drive while File History is running?
File History will pause and resume when the drive is plugged back in. You won't lose data, but the backup cycle will be interrupted. It's safe to unplug the drive anytime, though ideally you'd let File History finish its hourly backup first. You can check the backup status in Settings to see if one is in progress.
Do I need to back up if I use OneDrive?
OneDrive is not a backup—it's a sync service. If you accidentally delete a file or your computer gets infected with ransomware, OneDrive will sync that deletion to the cloud. File History or a system image protects you from accidental deletion and hardware failure in ways OneDrive cannot. Using both is the safest approach.
How often should I create a new system image?
System images are snapshots in time, so they're most useful before major changes like Windows updates or new software installations. You don't need to create a new one every week. Create one when your computer is running well, before any big changes, and then again if you make significant updates or install programs you want to preserve.
Can I back up to a network drive instead of an external hard drive?
Yes, both File History and system images can save to a network location if your computer is connected to a home network or business network. The network drive must be accessible and have enough free space. Network backups are slower than external drives but useful if you want backups stored away from your desk.