Published: September 26, 2026
Last Updated: September 26, 2026
Quick Answer: Data backup software copies your files and other data, then stores that copy separately. Accidental deletion. Hardware failure. Corruption. Any one of those hits, and you restore from the backup. No permanent loss. Where the backup lands depends on the software. External drive. Network location. Cloud storage. Some run automatically on a schedule.
A drive fails. Or a file disappears by accident. Or a system just stops responding. Each one counts as data loss. A backup exists for exactly this reason. Another copy, sitting separately, waiting if you need to restore it. The original data stops being your only option.
Copying a file isn’t the same as backing it up. The backup has to live somewhere separate. It also needs upkeep. Skip that, and it might not be there when you actually need it. A backup covers system files, configuration settings, or application data, kept apart from the original copy. Keeping it separate matters. Do that, and you can recover after deletion, a hardware failure, a security incident, or whatever disruption hits next. AWS covers this in more depth in its data backup and recovery overview.
Windows users aren’t starting from zero. Built-in tools like Windows Backup and File History cover supported files, settings, and preferences without extra software. Our guide to Windows backup software walks through how those built-in options stack up against other backup tools for PCs.
What is data backup software?
Data backup software creates and manages copies of your data. That’s the whole point. The original gets lost. Damaged. Deleted. Or just unavailable for some other reason. Either way, you’ve got a copy ready to restore.
Individual files and folders. Entire drives. System data. Some programs handle other workloads too. What a given backup program actually covers comes down to the software itself, and to the kind of data you’re protecting in the first place.
The main parts of a backup process are:
| Part |
What it does |
| Source |
Selects the files, folders, systems, or other data to protect |
| Backup software |
Creates and manages the backup process |
| Destination |
Stores the backup copy on another supported location |
| Schedule |
Determines when automatic backups run |
| Retention |
Controls which backup versions are kept |
| Restore |
Returns backed-up data when recovery is needed |
People often use “backup” and “restore” like they’re the same thing. They’re not. A backup is a copy of your data, kept separately so it can be recovered later. Restore is different. It’s the process of taking that copy and putting your files, settings, or other data back where they belong, whether that’s the original location or somewhere new. Microsoft splits backup, restore, and recovery into related but separate pieces of protecting a Windows device, and its Windows backup and recovery documentation walks through how each stage works.
For a backup system to be useful, you should also know where the backup is stored and how it can be restored.
Which types of data should you back up?
You should back up data that would be difficult, expensive, or impossible to recreate if the original were lost.
For a personal computer, this commonly includes:
- Documents and work files
- Photos and videos
- Important downloads and project folders
- Financial or administrative records
- Other files that cannot easily be replaced
For a business, the backup scope can be much wider. It may include databases, application data, shared files, virtual machines, system data, and other workloads.
Windows gives you two built-in options, and they don’t cover the same ground. Windows Backup handles supported folders, apps, settings, credentials, and preferences, all saved to a Microsoft account. File History works differently. It’s built for saving versions of your personal files, and it saves them to an external drive or a network location instead.
Neither tool is a full system-image backup. Not for every recovery scenario, anyway. Check what a given backup method can actually restore before you count on it.
Do not assume that every backup tool protects every type of data. Check the software’s supported sources before choosing a solution.
Local, external and cloud data backups
Backup destinations generally fall into local, external, network and cloud options. They solve different storage and recovery needs.
| Backup destination |
Best suited to |
Main consideration |
| Internal or local storage |
Short-term copies and convenient recovery |
A failure affecting the main device can also affect the backup |
| External drive |
Personal files and local recovery |
The drive must remain available and protected |
| Network storage |
Multiple computers or shared environments |
Requires suitable network storage and access |
| Cloud storage or cloud backup |
Off-site copies and remote recovery |
Depends on network access, storage capacity and the provider |
Local and external backups tend to restore faster. No downloading over the internet, the data’s just right there. Cloud and other off-site backups work differently. They keep a copy away from the primary location entirely. Theft. Fire. Flooding. A site-wide hardware problem. Any of those, and having that copy somewhere else pays off. But only if it’s actually usable. A cloud backup means nothing if the account, the retention settings, or the restore process aren’t configured right, or aren’t accessible when you actually need them.
One backup destination is a risk on its own, at least for anything important. Lose that device. Lose that account. Lose that location. Recovery options shrink fast either way. CISA recommends offline, encrypted backups of critical data for ransomware resilience. Testing their availability and integrity regularly matters just as much. A separate copy changes the odds, too, cutting the chance that one incident wipes out the original data and every backup along with it.
For data that’s important enough, a mix of storage locations is worth the extra effort.
How data backup software automates protection
Easy to forget. That’s the problem with manual backups, you have to actually remember to run one, and plenty of people don’t until it’s too late. Backup software skips that risk entirely; it just runs on whatever schedule you set and does its thing.
Here’s what a typical automated workflow looks like:
- Choose the data to protect. Select files, folders, drives or supported workloads.
- Choose a backup destination. This could be an external drive, network location or cloud destination.
- Set the schedule. Configure when backups should run according to your recovery needs.
- Set retention rules. Decide how many backup versions or recovery points should remain available.
- Run the backup. The software copies the selected data to the chosen destination.
- Verify the result. Check that the backup completed and that the data can be restored.
Take Microsoft’s File History. It automatically saves copies of your personal files to an external drive or a network location. Previous versions can be restored from there too.
Cloud backup services work a bit differently. They run on policies or settings that decide when a backup happens and how long each recovery point sticks around. Before picking one, dig into the details. Schedules. Retention options. Which data sources are actually supported. Restore methods. Any limits tied to the specific plan you’re looking at.
Automation cuts down on forgotten backups. It doesn’t, though, let you skip checking whether those backups are actually completing.
How to choose a data backup solution
Start with the data you need to recover, then work backward to the software and storage destination.
Check what the software can back up
Check what the software actually supports first. Files. Folders. Drives. Operating systems. Applications. Whatever workloads you need protected, make sure they’re on that list before you commit to it.
A file-focused backup tool may be enough for personal documents and photos. A business environment may require support for servers, databases, virtual machines or application-consistent recovery.
Check where backups can be stored
Look at the supported destinations before choosing a backup program. Common options include external drives, network storage and cloud destinations.
If you need protection against a problem affecting your physical location, an off-site backup destination is important. If you mainly need convenient local recovery, an external or network destination may be useful.
Look for scheduling and retention controls
Automatic scheduling helps when backups need to run regularly and you don’t want to handle it manually every time.
Retention matters too. A single current copy might not help much if it already includes unwanted changes or corrupted files. Keeping earlier recovery points gives you more options when it’s time to restore.
Check restore options
Backup software should be judged by its restore process as well as its backup process.
Check whether you can restore individual files, folders, drives or complete supported workloads. Also check whether the software lets you restore to the original location or another location when appropriate.
Consider security and isolation
Being a backup doesn’t make it safe. Not automatically, anyway. For ransomware resilience specifically, CISA’s guidance points to offline backups and multiple copies spread across separate, secure locations.
Cloud-based systems need their own check. Look at the provider’s documentation directly. Encryption. Access controls. Retention. Deletion protection. Recovery features. Don’t assume every service handles all of that the same way, because plenty don’t.
Test the restore process
A backup that cannot be restored when needed does not provide much practical protection.
Perform test restores appropriate to the importance of the data. Start with a small selection of files if you are checking a personal backup, then confirm that the recovered files open correctly.
For business systems, restoration testing should match the workload’s recovery requirements, including the recovery point objective (how much data loss is acceptable) and recovery time objective (how quickly the system must be usable again). Test the actual recovery steps, permissions, dependencies, and application usability—not only whether a backup job reports success.
Common data backup mistakes
Several backup problems come from relying on the existence of a backup rather than checking whether it can actually be used.
- Keeping the only backup on the same device: A failure affecting the device can also affect the backup.
- Using only one backup destination: A single copy gives you less protection if that destination becomes unavailable or corrupted.
- Never checking completed backups: An automated job can fail without providing the recovery result you expect.
- Never testing restoration: A successful backup job does not prove that the required files can be recovered.
- Backing up the wrong folders: Important files can remain outside the selected backup scope.
- Keeping only the newest copy: Earlier versions can be useful when files are accidentally changed or corrupted.
- Treating synchronization as a complete backup: File synchronization and backup solve different problems. A synced change can propagate to another location, while backup systems are designed to provide recoverable copies and versions.
Three parts, really, and none of them work without the others. Create the copies. Keep them somewhere appropriate. Then actually verify that restoring from them works, because a backup you’ve never tested restoring isn’t one you can count on.
Frequently asked questions
1. What does data backup software do?
Data backup software creates and manages copies of your data. That way, if something goes wrong, you’ve got something to restore from. Data loss. Corruption. Accidental deletion. Some other failure entirely. Whatever the cause, features vary by product. Check which data sources and destinations a given tool actually supports before you rely on it.
2. Is data backup software necessary?
It matters most when losing the original data would actually be a problem, the kind you can’t just fix by recreating the file or downloading it again. Hard-to-replace data raises the stakes. A reliable backup process becomes that much more important the harder the data would be to get back.
3. What is the difference between local and cloud backup?
Local backup keeps the copy close. An external drive, network storage, something physically nearby. Cloud backup works differently. It sends that copy off-site, to some cloud environment or hosted service, giving you a recovery location that isn’t tied to your building or your hardware at all.
4. Can backup software run automatically?
Yes. Plenty of backup systems support scheduled or policy-based runs. Schedules and retention controls aren’t standardized, though. They vary by software. Check the vendor’s documentation before you settle on a product.
5. How many backup copies should I keep?
No single number fits every situation here. A common starting point is the 3-2-1 approach: three copies of important data, at least two types of media, and one copy kept offline or otherwise separate from the primary environment. CISA presents this as a useful ransomware-resilience guideline, alongside offline, encrypted backups and regular restore testing. Even so, the right design still comes down to specifics. The value of the data. Acceptable downtime. Acceptable data loss. How much storage you’ve actually got.
6. Does Windows have built-in backup tools?
Yes, two of them. Windows Backup covers supported folders, apps, settings, credentials, and preferences, all saved to a Microsoft account. File History takes a different approach, saving versions of your personal files to an external drive or a network location instead. Neither one necessarily covers a complete bare-metal recovery for every PC. Check the restore options for whichever Windows feature you’re actually using.
7. Should I test my backups?
Yes. Assuming a backup works isn’t good enough, not really. Test it through an actual restoration. Pick a representative selection of files, restore them, then check that what comes back is actually usable.
A practical way to protect important data
Start with the backup scope. Then pick a destination that matches how fast and how reliably you need to recover the data. From there: automate the schedule. Keep an extra copy away from the original when the data actually matters. Test restoration regularly, not just once.
If you are building a broader backup setup, see the Backup Software guide for the main topic and related backup software options.
