Data backups matter because they let your business recover files and systems after ransomware, human error, hardware failure or a disaster. Without a tested backup, a single bad day can stop work and lose records you cannot recreate. Fast Response IT sets out below how backups work and eight steps to get them right.
What is a data backup?
A data backup is a separate copy of the important information held on your computers, servers, phones and cloud services. Its purpose is to let you restore that information if the original is lost, damaged or locked by an attacker.
A backup is only useful if you can restore from it. The copy has to be recent enough, stored safely and tested.
Why do backups matter?
Data is one of the most important assets a business holds, and it can be lost in many ways. Cyber attacks such as phishing and ransomware are one cause. Small user mistakes, like deleting a folder or overwriting a file, are another. Power failures, fires and floods can damage equipment as well.
A good backup supports several outcomes:
- Recovery. Restore files and systems quickly, which reduces downtime.
- Security. A clean copy means a ransomware demand is not your only way back to your data.
- Cost control. Backup has a cost, but losing customer or financial records costs far more in lost work and rebuilding.
- Consistency. Scheduled, automated backups remove the reliance on someone remembering to do it.
- Record keeping. You may need to keep copies of data for audit or legal reasons.
What types of backup are there?
Different methods suit different needs. Consider how much data you have, how often it changes and how quickly you need to recover.
| Type | What it does | Trade-off |
|---|---|---|
| Full | Copies everything | Slow and uses a lot of storage |
| Incremental | Copies only changes since the last backup | Fast and small, but restores can take longer |
| Differential | Copies all changes since the last full backup | Faster restore than incremental, but needs more space |
| Image-based | Captures a complete image of a machine | Restores a whole system after a major failure |
| File-based | Copies individual files, not the operating system or applications | Simple, but you must rebuild the system first |
Many businesses combine methods, for example image-based backups for servers and file-based backups for documents.
What are the eight steps to a reliable backup?
1. Build a backup strategy
Identify what matters most: accounting data, customer records, financial documents, intellectual property and key files. Decide how often each needs backing up, where copies are stored and how you would restore them.
2. Choose the right method
Match the method to your data volume, how often it changes and the recovery time you need. Do not choose on price alone.
3. Test your backups regularly
A backup that has never been restored is an assumption. Open files from it, restore samples and run recovery drills. A failed test is useful, because it shows the problem before a real incident.
4. Encrypt your backups
Encryption keeps backup data unreadable without a key. It matters most for off-site and online copies. Manage the keys carefully, because losing the key can mean losing the data.
5. Keep multiple versions
Several versions let you go back to a point before a file was deleted, overwritten or encrypted. One copy that is overwritten each night will also overwrite a problem.
6. Monitor your backups
Backups fail quietly. Set up alerts for failed jobs and check storage and status on a schedule, so a gap is found in days rather than months.
7. Review your disaster recovery plan
As your data grows and your business changes, your plan has to change too. Our guide to creating a disaster recovery plan covers recovery targets, roles and testing.
8. Train your staff
Staff should understand why backups matter, how to check that their work is covered and who to tell if something looks wrong. Your IT provider can support this training.
What is the 3-2-1 approach?
A widely used rule of thumb is to keep three copies of your data, on two different types of storage, with one copy off site. It is a useful starting point, and you can adapt it to your size and risk. At least one copy should be separated from your main network so an attack on your systems cannot reach it.
What should you ask your IT provider?
Ask three questions: what is backed up, how often, and when did you last test a restore. If your provider will not discuss backups or cannot tell you when they last tested one, treat that as a serious warning sign.
Fast Response IT sets up and manages backup and recovery for small and medium businesses, remotely and on site. See our backup and disaster recovery services for how this works.
Do cloud email and file sync services count as backups?
Not by themselves. Sync services mirror changes, so a deleted or encrypted file can be mirrored too. Many offer version history and a recycle bin for a limited time, which helps, but a separate backup gives you an independent copy.
What should you do next?
Pick your three most important sets of data and find out where they are backed up and when they were last restored. If you cannot answer, that is the place to start. The IT health check below reviews this alongside the rest of your IT.
Questions we get asked
How often should a small business back up its data?
It depends on how much work you can afford to lose. Critical data such as accounting records and customer information is often backed up daily or more often, while less important files can be weekly or monthly. Decide the acceptable loss for each type of data and set the schedule to match.
What is the difference between incremental and differential backups?
An incremental backup saves only what changed since the last backup of any kind, so it is quick and small but can take longer to restore. A differential saves everything changed since the last full backup, which restores faster but uses more space.
Is cloud storage the same as a backup?
Not necessarily. Syncing files to the cloud can copy a deletion or a ransomware-encrypted file along with everything else. A backup keeps separate, recoverable versions. Check that your cloud service keeps version history, or use a dedicated backup alongside it.
How do I know my backups work?
Test them. Open files from the backup, restore a sample to a different location, and run a recovery drill for important systems. Ask your IT provider when they last tested a restore. If they cannot answer, treat that as a warning sign.