Data backup – the best ways to protect your files

Losing data can be devastating – whether it is family photos, important documents or business files. A hard drive can fail, ransomware can encrypt everything, or you can simply delete the wrong folder. The only real protection is a regular backup. In this guide you will learn backup strategies, tools and best practices that keep your data safe.

Why is backing up data so important?

Data gets lost for many reasons, and usually without warning:

• Hardware failure: Hard drives, SSDs and USB sticks can fail without warning
• Ransomware: Malicious software encrypts all your files and demands a ransom
• Theft or loss: A laptop or external drive can be stolen or lost
• Human error: Accidentally deleting, formatting or overwriting files
• Disasters: Fire, flood or a power surge
• Corrupted files: Software bugs or viruses can damage files

Types of backup: cloud vs local

There are two basic approaches, each with its own pros and cons:

Cloud backup (online backup)

Your data is stored on remote servers over the internet.

Pros:

• Access from any device, anywhere
• Automatic backups without you having to do anything
• Protection against physical disasters (fire, flood)
• Easy to add more space
• File versioning (restore older versions)

Cons:

• Needs an internet connection
• Monthly subscription costs
• Restoring large amounts of data is slower
• Possible privacy concerns

Popular cloud backup services:

• Google Drive: 15 GB free, integrated with Google’s ecosystem
• OneDrive: Great for Microsoft users, 5 GB free (1 TB with Microsoft 365)
• Dropbox: 2 GB free, excellent syncing
• Backblaze: Unlimited space per computer with a subscription, built for backup
• iCloud: 5 GB free, ideal for Apple devices

Local backup (external drive or NAS)

A backup on a physical device that you keep yourself.

Pros:

• Fast access and restore
• No monthly costs – you pay for the device once
• No internet connection needed
• Full control over your data
• Great for large amounts of data

Cons:

• Can be stolen, lost or damaged
• Vulnerable to physical disasters (fire, water)
• Usually has to be started manually (except with a NAS)
• The device itself can fail

Good options for local backup:

• External hard drive: Cheap and large (1–5 TB)
• External SSD: Faster and more robust, but more expensive
• NAS (Network Attached Storage): A small home server with automatic backups
• USB stick: Handy for smaller files

The 3-2-1 rule

The golden rule of data protection that professionals use:

• 3 copies of your data: The original + 2 backups
• 2 different types of media: For example an external drive + the cloud (not everything on one type of device)
• 1 copy off-site: One copy somewhere else (the cloud, or a drive kept with friends or family)

An example 3-2-1 setup:

1. The original data on your computer (C: drive)
2. Backup #1 on an external hard drive at home
3. Backup #2 in a cloud service (Google Drive, OneDrive)

This way your data survives even the worst scenarios – fire, theft or ransomware.

Automatic backup

Manual backups are impractical and people forget them. Automate the process!

Windows backup tools

1. File History

Built into Windows 10 and 11, it backs up to an external drive:

1. Connect an external drive
2. Open Control Panel > File History
3. Select the external drive and click Turn on
4. Copies of your documents, pictures and desktop are saved automatically every hour

2. System image backup

Creates a complete copy of the whole system (the C: drive with Windows):

1. Control Panel > Backup and Restore (Windows 7)
2. Create a system image
3. Select the external drive
4. Start backup

3. OneDrive (cloud backup)

Automatically syncs your Desktop, Documents and Pictures folders with Microsoft’s cloud.

Dedicated backup software

• Acronis True Image: A complete backup suite with disk imaging and cloud integration
• Macrium Reflect: Reliable disk imaging, popular with IT professionals
• EaseUS Todo Backup: Easy to use, with a free version
• Veeam Agent: A professional tool, free for personal use

Mac backup – Time Machine

macOS has Time Machine built in, which backs up the whole system automatically:

1. Connect an external drive
2. System Settings > General > Time Machine
3. Click Add Backup Disk and select the drive
4. Time Machine then backs up automatically every hour

What should you back up?

Prioritise the data you cannot replace:

Critical data (ALWAYS back up)

• Family photos and videos
• Important documents (contracts, diplomas, certificates)
• Financial records (tax documents, invoices)
• Business documents and projects
• Contacts and emails
• Software settings and configurations

No need to back up

• The operating system (Windows, macOS) – it can be reinstalled
• Programs and apps – they can be downloaded again
• Temporary files and caches

How often should you back up?

It depends on how important the data is:

• Critical business data: Daily or continuously
• Personal documents: Weekly
• Photos and media: Monthly or after important events
• The whole system (system image): Quarterly or before major changes

Test your backup

A backup you have never tested is not a backup! Regularly check that you can restore your data:

• Try restoring a few files from the backup
• Check that the files open and are not damaged
• Test a system image restore on a spare computer
• Check that the automatic backup actually runs on schedule

Backing up phones and tablets

Android

• Google Photos: Automatic photo backup (shares the 15 GB of free Google storage)
• Google Drive: Backup for documents and files
• Settings > Google > Backup: Backs up apps, settings and contacts

iPhone/iPad

• iCloud Backup: Settings > [your name] > iCloud > iCloud Backup
• Finder/iTunes backup: Back up to your computer over a cable
• iCloud Photos: Uploads your photos automatically

Conclusion

Backing up your data is not optional – it is essential. Losing data can be emotionally and financially devastating. By following the 3-2-1 rule, using automatic backups and testing them regularly, you can make sure your data stays safe whatever happens.

Start today – back up your most important files to a cloud service and an external drive. Your future self will thank you!