Start with the files you need to restore, then choose how to keep a separate copy. Cloud sync helps you use current files across devices, but changes can spread between them; an external drive provides a local copy, while a cloud-backup service offers another way to restore files. For irreplaceable photos or important work records, consider both a local and a cloud copy if you can maintain them and test that restoration works.
If a photo, video or document would be difficult to recreate, you need to know which separate copy you could restore. The National Cyber Security Centre describes a backup as a copy kept in a separate safe location.
When coursework or household files move between laptops, phones and tablets, check both which files are copied automatically and which are merely synced for access across devices.
Current work files need a practical restore route as well as convenient access. If those files include other people's personal data, account protection and suitable safeguards matter too; the Information Commissioner's Office highlights the need to restore access to personal data after an incident.
Choose the arrangement around the files and devices it must cover, then check how you would recover an older or lost copy. A combined arrangement makes sense only if you can keep track of what each copy contains.
Consider it when: You want a local copy of computer folders or a large photo library, including files you need without an internet connection.
Trade-off: You must arrange the backups and protect the drive; one copy kept in the same place remains vulnerable to loss or damage there.
Consider it when: Automatic copying of changing computer files matters more than managing a removable drive.
Trade-off: Restoration depends on account and internet access, file coverage and the service's retention rules.
Consider it when: Your main task is opening current documents or photos on more than one device.
Trade-off: Edits and deletions can sync too, so check how earlier versions are restored before treating it as your only copy.
Consider it when: Photos, study work or self-employed records warrant both a local restore option and a copy away from the main device.
Trade-off: You must check coverage for each copy, secure the accounts and drive, and practise restoring a file.
| Concern | What to check | Who this matters to |
|---|---|---|
| Coverage across devices | Which phone data and computer folders are included; whether copying runs automatically. | I use a phone and computer for current files and do not want recent changes left on just one device. Around 31% of consumers put automatic cross-device coverage first. |
| Recovering lost or changed files | How to restore a file; how long older and deleted versions remain available. | If I overwrite a work document or lose a device, I need a usable earlier copy rather than only today's synced version. Restorable copies are the first concern for around 25% of consumers. |
| Capacity and offline access | The size of the files to protect and room for growth; which cloud files remain available offline. | My photo or video collection needs enough space, and I may need files when the connection is unavailable. Around 25% of consumers prioritise capacity and local access. |
| Account and data protection | Account-recovery and two-factor authentication options; protection for a lost drive. | If my self-employed files include sensitive information, I need to control who can reach the copies and how access is restored. Security is the primary concern for around 19% of consumers. |
Google Drive Help says changes to streamed or mirrored files reflect across devices. If you edit or delete something by mistake, recovery depends on the applicable version and deletion rules.
For files you cannot recreate, check the restore window and keep a separate backup copy.
A connected drive can be exposed to the same incident as the computer. The National Cyber Security Centre cautions that neither local nor cloud backups resist ransomware by default.
Disconnect removable media between backups when practical, secure it, and keep another copy elsewhere for irreplaceable files.
Google says account storage is shared across Drive, Gmail and Photos. A growing photo library can therefore affect the space available for other files.
Check usage across those services before choosing a storage allowance, then review it as your files grow.
Microsoft Support describes 30-day version history for OneDrive files, and Backblaze Help describes a default 30-day version history. Neither period should be mistaken for a permanent archive.
Check the terms for the service and plan you intend to use, including deletion, older versions and what happens when access to the service ends.
These brands illustrate different device-backup and cloud-storage workflows; their inclusion is not a recommendation to use one service for every file.
Relevant to households backing up an iPhone or iPad through iCloud or a computer.
Relevant to Android users and households storing files across Drive, Gmail and Photos.
Relevant to people using OneDrive for Windows folders and access across devices.
Relevant to people considering a dedicated computer-backup service.
These portable drives represent the local-storage part of a backup arrangement. Choose capacity for the files you intend to copy, then arrange and test the backup and restore process; a drive on its own does not provide cloud coverage.
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Consider this 2TB local drive if it has room for the computer files you intend to copy. Check which folders your backup setup covers and practise restoring a file; if you use a Mac, confirm the setup required for your computer.
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The 5TB capacity may suit a larger local collection if it covers your files and expected growth. Confirm setup for your computer, the backup and restore procedure, and the applicable warranty term before choosing this variant.
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This portable 1 TB SSD is a local-copy option when that capacity covers your selected files. Check its connection with each intended device, configure a backup routine and test a file restore; set up access protection if you need it.
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Use this 1TB SSD as a local copy only if the selected files fit with room for future backups. Confirm that this is the intended capacity variant, then set up a backup routine and check that you can restore a file.
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Consider this 1TB USB-C SSD for a portable local copy if it suits your file size and devices. Check compatibility for any phone feature you intend to use: the described magnetic attachment and direct-recording features apply to specified iPhone 15/16 Pro models, not every iPhone 15 or 16. Arrange and test file backups separately.
No: sync keeps files aligned, so edits or deletions can appear on other devices too. Google Drive Help describes that behaviour for streamed and mirrored files. If you depend on sync for recovery, check its version and deletion windows and keep a separate copy of files you cannot recreate.
Start with the size of the folders, photos and device data you will actually copy, then allow for growth and any older versions you intend to keep. For a cloud plan, check what else uses its allowance: Google says storage is shared across Drive, Gmail and Photos.
Check that a recent file from each important folder is included, then restore a non-critical file without overwriting your working copy. A completed backup job is less useful if the files you need are outside its coverage or you cannot retrieve them.
Choose safeguards suited to the personal data you handle and make sure you can restore access after an incident. The Information Commissioner's Office says data-security measures must enable timely restoration of access and availability; the appropriate arrangements depend on the processing and its risks, not on a single drive capacity or service.
Protect the account as well as the files: use a unique password, check whether two-factor authentication is available and keep account-recovery details current. If access to that account is your only restore route, consider how you would recover important files if you could not sign in.