For work records, coursework or family photos that would be difficult to replace, consider both a local backup and a separate online copy, as the National Cyber Security Centre advises. An external drive offers recovery without downloading files, while cloud backup offers an off-site copy; file-sync storage is useful for access across devices, but check its restore options before relying on it as your only backup.
If family photos, personal documents or self-employed records would be hard to recreate, prioritise a copy you can restore from a separate location. The National Cyber Security Centre advises considering both online and storage-device backups.
For current coursework or working documents needed on a laptop and phone, sync can make selected files accessible across devices. Check which folders are included and how changed or deleted files can be restored; Microsoft, Google and Apple describe different sync and recovery options.
An external drive can provide a local copy of a large photo or video library without depending on a download for recovery. Check its capacity, connection and file system against the computers that will use it; Western Digital documents different Windows and macOS read/write behaviour for exFAT and NTFS.
Start with how you would recover a lost or changed file, then decide whether you also need current files across devices, local storage without dependable broadband, or control over continuing charges.
Choose it when: A local copy of a large library or recovery without a download matters.
Trade-off: A drive kept with the laptop can be lost or damaged with it; a connected drive may also be exposed to malware, as the National Cyber Security Centre warns.
Choose it when: You want automatic off-site copies and can use a service compatible with your computer.
Trade-off: Backup and restoration depend on internet access and the service’s retention and subscription terms; check what can actually be restored.
Choose it when: Your main need is access to current work or study files across devices.
Trade-off: Changes and deletions can sync too, so recovery depends on the service’s available history and restore options.
Choose it when: Losing important records, coursework or family photos would make reliance on one device or location unacceptable. The National Cyber Security Centre advises considering both types of copy.
Trade-off: You must maintain and test two backup routes rather than assuming that either job has completed.
| Concern | What to check | Who this matters to |
|---|---|---|
| Recoverable files | Check how to restore a file or folder, whether earlier versions are available and how long they remain recoverable. | If my laptop fails or I overwrite an important file, I need a separate copy I can restore. Around 33% of consumers put recoverability first. |
| Access across devices | Check supported devices, included folders and whether files are stored locally or need a connection. | When coursework or working documents change during the day, I need the current files on my other devices. For around 27% of consumers, that access is the primary need. |
| Local capacity | Compare drive capacity with the files to protect and expected growth; confirm the connection and file-system compatibility. | With a large photo library or unreliable broadband, I need enough space for a local copy I can recover without downloading it. Local capacity comes first for around 20% of consumers. |
| Continuing charges and quota | Check billing and cancellation terms, storage allowance and whether other services share the quota. | As my files grow, I need to know whether a subscription and shared storage limit remain workable. Around 20% of consumers prioritise that control. |
Sync can carry an overwrite or deletion to other devices. Apple distinguishes synchronised iCloud Drive files from data included in iCloud Backup, while Microsoft documents separate version-history recovery for OneDrive files.
Check the available restore history and keep another copy of files you cannot replace.
The National Cyber Security Centre warns that malware can affect storage connected to an infected computer. A drive kept beside the laptop is also vulnerable to the same theft or physical damage.
After a completed backup, disconnect and store the drive securely where practical; consider an off-site copy for irreplaceable files.
Photos, videos and other account data can use the same cloud allowance. Google says storage is shared across Drive, Gmail and Photos.
Measure the files you intend to protect, allow for growth and check whether other services use the same quota.
Changing a drive’s file system can erase what is already on it; Western Digital describes formatting as data-destructive.
Check the file system you need and make a recoverable copy of existing files elsewhere before reformatting.
External drives to consider when local capacity and Windows/macOS file-system access shape the choice.
External HDD and SSD lines to consider if bundled Toolkit functions matter to your backup routine.
Sync-enabled storage for selected folders that need to be available across devices.
Shared cloud storage and computer-file syncing for people already using Google services.
Sync and device-backup features for Apple-device households, with iCloud Drive access through iCloud for Windows.
A dedicated cloud-backup service to consider for a Mac or Windows computer.
No: sync keeps selected files updated across devices, while a backup needs to provide a copy you can restore. Apple distinguishes iCloud Drive and iCloud Photos syncing from iCloud Backup; for important files, check version history and keep a separate copy rather than assuming sync preserves an independent archive.
Disconnect it after a completed backup and store it securely where practical, unless your chosen backup setup requires a continuous connection. The National Cyber Security Centre warns that viruses can affect storage connected to an infected computer.
Yes, if its connection and file system meet both computers’ needs. Western Digital says exFAT permits read/write access on Windows and macOS, while NTFS is read/write on Windows and read-only on macOS; copy existing files elsewhere before any reformatting.
Try restoring a small file and, where the service offers it, an older version or a folder. The National Cyber Security Centre’s backup guidance centres on regaining access after data loss, so a completed backup job alone is not the same as a tested restore.