For work, study or family files that would be difficult to replace, combine a local backup with a separate off-site copy. An external drive offers a straightforward local route, while cloud backup can provide an off-site copy; a NAS suits households prepared to manage shared storage and back it up separately. Before choosing, check what can actually be restored after a device fails, not just which files synchronise.
If you keep self-employed records, coursework, family photos or long-running projects, plan how to recover them after a device failure. A local copy helps with recovery at home, while a separate off-site copy protects against a loss affecting both the device and its nearby backup. Seagate and Synology both describe the role of separate copies in a backup plan.
A dedicated external drive can suit one-computer backups when you are willing to connect it regularly and check that files can be restored. A drive kept in the same home is not an off-site copy, so decide whether the files also need protection elsewhere.
When files sit across computers, phones and tablets, check which devices each backup method covers. A shared cloud plan and a NAS address different needs: plan membership does not automatically share private files, while a NAS needs its own backup destination.
Start with the restore you would need if a computer or phone stopped working. Then decide where to keep separate copies, how much routine maintenance you can manage and who needs access.
| Concern | What to check | Who this matters to |
|---|---|---|
| Recovery after failure | Confirm which files are backed up, how to restore them without the original device and how long earlier versions remain available. | If my computer fails or a file is damaged, I need a usable earlier copy rather than access only to the latest synchronised version. Roughly 37% of consumers put this recovery need first. |
| Simple local copying | Check that the drive works with your computer, has room for the files and future backups, and fits a routine you will maintain. | I want to back up one computer without managing a cloud subscription, but I can make time to connect and check a drive. For roughly 27% of consumers, that straightforward local routine is the primary concern. |
| Access and family privacy | Check the devices covered, member eligibility, whether capacity is shared or allocated per person, and whether files remain private. | When I need files on another device or share a household plan, I want access without automatically exposing my documents to everyone else. That is the first concern for roughly 18% of consumers. |
| Several-device management | Check the backup applications and capacity supported by the NAS you are considering, plus where its own separate backup will go. | With files on several household devices, I need a central routine I can maintain and recover from. Roughly 18% of consumers prioritise that management need. |
A copy beside the original equipment may be affected by the same theft, fire or water damage. Synology also warns that RAID and drive failures can cause data loss in a NAS.
Keep a separate off-site copy of hard-to-replace files, and periodically test that you can restore from both destinations.
Apple distinguishes data synchronised to iCloud from data included in an iCloud Backup. Recovering everything you need may depend on both your account access and the available backup.
List the folders, photos, messages and apps that matter, then check which are synchronised, backed up or excluded.
A large download may take longer than your connection allows. Backblaze says its ZIP restores have a 500GB-per-request limit and may not suit very large recoveries.
Check the download limits, your connection and whether a physical restore method is available to you before relying on cloud backup for a full recovery.
Backblaze says its mailed-drive restores are shipped from the United States, so physical delivery also needs to fit your recovery plan.
Central storage adds configuration, drive replacement and ongoing backup tasks. Synology recommends another destination rather than relying on the NAS alone.
Plan a separate external, remote or cloud destination, and test restoring a file before depending on the setup.
iCloud+ is relevant to Apple-device households considering iPhone or iPad backup alongside synchronised file access.
Microsoft 365 with OneDrive is relevant if you already use its productivity apps and want cloud file storage with a restore option.
Google One is relevant to households already using Google Drive, Gmail or Google Photos that need shared account storage.
Backblaze Personal Backup is relevant to Mac or Windows users seeking automated computer backup rather than primarily a file-synchronisation plan.
Synology NAS products are relevant to households prepared to manage central storage and a separate backup destination.
These external hard drives and portable SSDs are options for keeping a local copy of work, study or family files. Choose capacity and computer connections for your own backup routine, and keep a separate off-site copy of files you could not replace.
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Consider this for a portable local copy of files from one computer, with a routine for keeping another copy off-site.
Check the intended computer's connection and, for macOS use, whether a driver is needed.
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The 5TB portable drive may suit a larger local backup set if its connection and file-system setup fit your computer.
Windows use is described as requiring a downloadable HFS+ driver. Confirm the applicable warranty term before buying, and keep a separate off-site copy.
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This portable SSD provides a local-copy option when you need 4 TB of storage you can carry separately from your computer.
Its name specifies USB Type-C and USB 3.2 Gen 2x2. Check your computer's port if that connection standard matters to you, and arrange an off-site copy as well.
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Consider the 1 TB portable SSD for a local backup set that fits that capacity and a routine that keeps another copy elsewhere.
The name specifies USB 3.2 Gen 2. Its stated IP65 rating does not cover full immersion, so do not treat it as protection against submersion.
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The 4TB portable hard drive is a local-copy option for a growing collection of personal, study or work files.
Check its USB connection against your computer. Mac use may require reformatting; confirm the file-system setup you need, and maintain an off-site copy separately.
Not necessarily: synchronisation gives access to current files, but you also need to know which earlier copies you can restore. Apple distinguishes synchronised iCloud data from iCloud Backup, while Microsoft says Microsoft 365 subscribers can restore OneDrive changes from within the preceding 30 days. Check the folders covered and the recovery window before relying on either service as your only backup.
Yes, if a usable iCloud backup exists for setting up the replacement device. Apple says data already synchronised to iCloud is handled separately, so check both what the backup contains and whether you can access the Apple Account needed for recovery.
Check how capacity is shared, who can join and whether files remain private. Google says family members share a storage quota without automatically accessing one another's files and must live in the organiser's country. Apple says iCloud+ can be shared with up to five other family members using separate Apple Accounts.
They may matter if you are self-employed and handle clients' personal information; they are not a blanket requirement for ordinary household files. The Information Commissioner's Office says purely personal, family or household processing falls outside UK GDPR, while rules for restricted international transfers can apply to organisations, including sole traders, when the relevant conditions are met. Check the particular service's contractual and data-location information for your work files.