Who needs this backup arrangement?

Self-employed people with client and finance files

Identify the invoices, customer information, contacts, email and working documents needed to resume trading. The National Cyber Security Centre advises small organisations to back up the data their business needs to operate, rather than choosing a drive by capacity alone.

Home offices with limited internet access

A local drive offers a way to make copies without depending on a cloud connection. Plan when it will be connected, where it will be stored afterwards and how you would recover if the drive and computer were lost together.

Businesses backing up several devices

Network-attached storage (NAS) may make scheduled local backups easier to manage across devices, provided you can administer access and updates. The National Cyber Security Centre cautions that connected backups are not resistant to ransomware by default, so a NAS still needs an independent copy.

What should you check before choosing?

Start with the work you must be able to restore, then decide which combination of cloud, local and disconnected copies covers the failures that would interrupt it.

PriorityWhat to checkYour needs
Backup scope and capacity List essential files, email, contacts and any application or device data needed for recovery. Size storage for that set, retained versions and growth; check whether the backup covers selected folders or a broader device. I need more than my documents folder if client records, invoices or email are necessary to get back to work.
Earlier versions For cloud storage or a backup service, check how to restore a file after deletion, overwrite or corruption, and how long earlier versions remain available. The National Cyber Security Centre advises checking recovery from earlier cloud-backup versions. If damage goes unnoticed for a while, I need a recoverable copy from before it happened—not just the newest synchronised file.
Local and offline copies Check how a drive is disconnected after backup and stored separately. If using a NAS, check access separation and how you will keep an independent off-site or offline copy; the National Cyber Security Centre notes that connected backups are not protected against ransomware by default. A failed computer, compromised account or incident at my work location should not leave every copy out of reach.
Access and encryption Check two-step verification and account-recovery controls for cloud access, plus encryption and secure storage for removable media. The Information Commissioner's Office highlights encryption as protection for stored personal information when a device is lost or stolen. When a backup contains client personal data, I want to protect both the online account and any drive I carry or store locally.
Schedule and restore test Set backup frequency by how much changed work you could recreate. The National Cyber Security Centre gives daily or weekly copies of essential information as a small-business action point; periodically restore representative files and check that they open. Work changes throughout my day, so I need a schedule I can maintain and a way to confirm that recovery works.

Which backup mistakes matter?

  • Assuming a synchronised folder contains everything

    A cloud folder may omit email, contacts or application data needed to resume work. A later deleted or corrupted file may also replace the current synchronised copy.

    List what must be recovered, confirm what the service includes, and try restoring an earlier file. Check the retention period before relying on version history.

  • Leaving the only backup drive connected

    The National Cyber Security Centre warns that an infected computer can affect connected external storage and that attackers may target backups.

    Disconnect the drive after copying, store it securely and keep another independent copy if losing that drive would seriously interrupt work.

  • Treating a multi-drive NAS as an independent backup

    A NAS on the same network can remain reachable during an attack, while one kept beside the computer shares risks from an incident at that location. Multiple disks do not remove either exposure.

    Check administrator access, updates, snapshot recovery and restore procedures, then maintain a separate off-site or offline copy.

  • Never testing account access or restoration

    A copy is of little use if recovery credentials are unavailable or the files cannot be restored in a usable form.

    Protect account-recovery methods, limit backup-management access and periodically restore representative files to a separate location.

Relevant service and NAS brands

These examples illustrate features to compare across backup routes; a brand name alone does not establish that every file or recovery scenario is covered.

Microsoft OneDrive

Cloud file storage and synchronisation for work kept in OneDrive, including home offices using Microsoft 365 or Windows.

  • Microsoft Support describes restoration of older versions of files stored in OneDrive and restoration of OneDrive to an earlier time.
  • Check the account or plan conditions, restoration window and whether all work-critical data is stored there.

Backblaze

An automated computer-backup service to consider when a defined version-history policy matters.

  • Backblaze states that its default Version History is 30 days, with longer options available.
  • Check the selected retention option and backup scope; do not assume an older deleted or changed file remains recoverable indefinitely.

Synology

A NAS route for someone prepared to administer central local storage and maintain an independent copy.

  • Synology documentation describes scheduled snapshots and product-dependent immutable snapshots that restrict changes for a specified period.
  • Check model support and configuration. Snapshots on a local NAS do not, by themselves, create an off-site or disconnected copy.

External drives for a local copy

These Joybuy external hard drives and SSDs represent the local-drive route. Compare their stated capacity and connection with your backup set and computer, then plan a separate copy if losing the drive would prevent recovery.

Western Digital My Passport 2TB portable external hard drive in black

Western Digital My Passport 2TB Portable External Hard Drive, Black

For a portable local copy, compare its 2TB capacity with your full work-data inventory and room for retained versions. Check how your chosen backup method restores earlier files; disconnect the drive when the copy is complete.

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Western Digital My Passport Ultra for Mac 5TB portable external hard drive in silver

Western Digital My Passport Ultra for Mac 5TB Portable External Hard Drive, Silver

This 5TB portable hard drive is a local-copy option for a Mac setup. Compare its capacity with the data and versions you intend to retain, and confirm connection, formatting and restore requirements for your computer.

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Samsung T7 Shield 1 TB portable SSD in blue

Samsung T7 Shield 1 TB Portable SSD, USB 3.2 Gen.2, Blue

A portable SSD can hold a local copy of selected work files. Check whether 1 TB covers everything you need to restore, and arrange a repeatable backup and earlier-version recovery method rather than relying on occasional manual copying.

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Samsung MU-PE1T0S 1TB USB Type-C external SSD in black

Samsung MU-PE1T0S 1TB USB Type-C 3.2 Gen 2 SSD, Black

For a portable local backup, check that the 1TB capacity fits your protected files and retained copies. Confirm the connection and backup procedure for your computer, and keep the drive disconnected between backups.

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Samsung MU-PG4T0B 4 TB USB Type-C external SSD in black

Samsung MU-PG4T0B 4 TB USB Type-C USB 3.2 Gen 2x2 SSD, Black

This 4 TB SSD is another portable destination for a local copy. Check capacity against your work-data inventory, confirm your computer's connection and test that your backup method can restore the versions you need.

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Backup questions

Which files should I count when choosing backup capacity?

Count what you need to resume work, not just what is in your documents folder. That may include customer records, invoices, email, contacts, website data and application or device data. Decide whether selected folders are enough, then allow capacity for retained versions and growth.

How often should a self-employed home office back up?

Choose a schedule based on how much changed work you could afford to recreate. The National Cyber Security Centre gives daily or weekly copies of essential information as a small-business action point; work that changes more often may call for more frequent automatic copies. Test restoration periodically, whatever schedule you use.

Is cloud storage enough on its own?

Not if losing access to the account or recovering only the latest damaged file would leave you unable to work. The National Cyber Security Centre cautions that cloud backups are not resistant to ransomware by default. Check backup scope, earlier-version restoration and retention, and keep an independent local or offline copy when that dependency is unacceptable.

When is an offline copy worth keeping?

Keep a recent disconnected copy of important work when ransomware or account compromise could block recovery from connected storage. The National Cyber Security Centre recommends a recent offline backup of important files. Store removable media securely and consider a separate location if one incident could affect both your computer and the copy.