Keep an older backup until the replacement PC’s important files are backed up and you have tested that you can restore them. An external HDD suits a capacity-led local archive, while an SSD is worth considering for frequent transfers or a drive you carry; cloud backup adds an off-site route, provided its capacity, account protection and recovery settings meet your needs. For files you cannot replace, a local copy and a separately protected cloud copy avoid relying on one drive or location.
Keep the previous backup while you check that essential files have reached the new computer and can be restored. The National Cyber Security Centre (NCSC) identifies a new or broken device as a reason to use a backup to transfer or recover data.
If losing a file would matter, plan for recovery from deletion or device failure, not just extra space. The NCSC warns that ransomware has affected computers and their connected USB or network backup drives, so consider a separately protected copy.
A network-attached storage device, or NAS, may suit a household willing to set up and maintain central storage for several computers. Synology describes scheduled PC-folder backup for its DS223j line; a household NAS still needs a separate recovery copy.
Start with what must be recoverable from the old and new PCs, then decide where each copy will live and how you will restore it.
| Priority | What to check | Your needs |
|---|---|---|
| Restoring files | Identify essential folders on both PCs. Make a new backup, restore a few representative files and decide how long to retain the older copy. | I need to know that the new backup works before deleting files that may exist only in the old one. |
| Separate copies | Check whether the local drive can be disconnected between backups and whether another copy is stored separately. The NCSC advises against leaving backup media permanently connected. | A fault or attack affecting my PC should not reach every copy of files I cannot replace. |
| Capacity | Measure the archive, allow for growth and decide how many earlier backups to retain. For a cloud plan, check which services share its allowance; Google says its standard account’s up-to-15 GB allowance is shared across Drive, Gmail and Photos. | I want room for current files and the older material I still need, without deleting a backup merely to make space. |
| Transfers and connections | Check the replacement PC’s port, the supplied cable and the exact drive’s stated speeds. Maximum transfer rates depend on the connection and workload. | If I move large files often or carry the drive, transfer time and a workable connection matter to me. |
| Cloud recovery | Check account protection, storage limits, renewal terms and whether previous versions or deleted files remain restorable. The NCSC advises setting cloud-backup retention to match the backup schedule. | I need an off-site copy that I can still recover if a file is changed or deleted. |
| Shared household storage | For a NAS, check compatible internal drives, device backup settings and who will maintain it. Plan a further copy outside the NAS. | Several devices need one household backup location, and someone can manage its setup and upkeep. |
A change or deletion can reach copies that remain accessible to the same computer or account. The NCSC has also seen ransomware affect connected backup drives.
Keep a separately recoverable copy, disconnect a local backup drive when it is not in use and check how the cloud service restores earlier or deleted files.
The older copy may still contain a folder you missed or a file that did not transfer correctly to the replacement PC.
Complete the new backup, compare your essential folders and test a restore of representative documents and photos before deciding what to remove.
A drive or cloud allowance that holds today’s files may leave no room for growth or for an earlier backup you still need.
Measure the existing archive and decide how many backup generations to keep. For cloud storage, check what uses the allowance and what happens when a plan ends.
A home NAS can organise backups for several devices, but it remains at the household location. Snapshots do not remove the need to plan for loss of the NAS itself.
Use its backup features for the household workflow, then keep essential files in another separately protected location.
A NAS also requires compatible internal drives, setup and ongoing maintenance.
These product-line examples illustrate different storage routes; check the exact model and its connection before choosing.
Seagate offers external HDD lines for local backup. Its One Touch product information describes password protection and AES-256 hardware encryption for that line.
The 2 TB Extreme Portable External SSD is a USB-C option for portable file transfers; the model is specified with hardware encryption.
Synology’s DS223 and DS223j materials describe household NAS features including PC-folder backup. Synology states up to 40 TB of raw capacity for the DS223, depending on installed drives; usable capacity varies with the configuration.
These portable HDDs and SSDs are options for a local copy after replacing a PC. Choose enough capacity for the files you intend to retain, check the connection to your new computer and plan a separately recoverable copy for essential files.
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This portable HDD is a local-storage option for a sizeable archive from an older PC. Check the replacement computer’s compatibility and any driver needed for Windows use before buying. Keep another recoverable copy rather than relying on this drive alone.
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This portable HDD offers a 2TB local-copy option if that capacity fits your current files and retained backups. Check its setup requirements for the replacement PC’s operating system. Disconnect the drive between backups and keep essential files recoverable elsewhere.
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Consider this portable SSD if you carry a local copy or transfer files frequently. Confirm its connector, supplied cable and compatibility with the replacement PC; if you need encryption or earlier-version recovery, check those features separately. Keep another recoverable copy of essential files.
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This USB Type-C SSD is a portable local-copy option when your archive fits within 1TB. Check that the replacement PC has a suitable connection and that the capacity covers the files and backup versions you intend to keep. Arrange a separate recovery copy for essential files.
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This portable HDD offers 4TB for a local file archive. Check its connection and whether the drive needs reformatting for your replacement computer’s operating system. Protect it from physical damage, disconnect it between backups and retain another recoverable copy.
Keep it until you have backed up the current files and successfully restored representative files from the new copy. Check older folders too: a file missing from the replacement PC may still be in the previous backup. The NCSC advises making backups that can be used to recover or transfer data.
One drive gives you a local copy, but it leaves essential files dependent on that drive if there is no other recoverable copy. The NCSC has seen ransomware affect connected USB and network backup drives and advises against leaving backup media permanently connected. Disconnect the drive between backups and keep important files separately protected.
No. An off-site account can provide separation, but you need to check its capacity, account protection and ability to restore previous or deleted files. Check the retention period before relying on it; the NCSC advises aligning cloud-backup retention with the backup schedule.
An HDD is a sensible route to consider for a capacity-led archive copied or restored less often; an SSD is worth considering if you frequently move large files or carry the drive. Check each model’s capacity, connection and stated transfer conditions rather than assuming every external drive will fit the same workflow. Neither drive replaces the need for another recoverable copy of essential files.