Start by downloading a complete local copy and choosing storage with room for the library and future additions. An external drive suits a personal archive; consider a NAS when several people or devices need managed local access and you can maintain another backup. Keep cloud access if it is useful, but do not treat a synced folder or one permanently connected drive as your only recoverable copy: the National Cyber Security Centre advises keeping backups separate from the devices they protect.
If most photos or documents live in a cloud account, the first task is getting usable files onto local storage. Google Account Help describes exporting data from services including Photos; Apple Support explains how to download full-resolution iCloud Photos originals to a Mac. Check the export options for the service you actually use.
A drive passed between Windows PCs and Macs needs a file format that works with the intended copying method. Seagate describes exFAT as an option for cross-platform file exchange, but its guidance says not to use it for Time Machine.
A NAS can provide a centrally managed library rather than a drive moved between computers. Synology describes file sharing and backups for its DS224+; anyone using encrypted shared folders also needs to keep the key required to access them later.
Decide how you will obtain and check the complete local copy before comparing drives. Then choose between a periodically updated external drive and a managed shared-storage arrangement; cloud storage can remain an additional copy rather than serving as the only backup.
| Concern | What to check | Who this matters to |
|---|---|---|
| Independent recovery | Check that files form a separate, readable copy. Plan where to keep a removable drive when it is not being updated; the National Cyber Security Centre advises against leaving a backup device connected when it is not in use. | If I lose access to my computer or cloud account, I need files I can open from another copy. Around 33% of consumers put independent recovery first. |
| Library capacity | Measure the downloaded or exported library, then allow room for new files and any backup history you intend to retain. | When my photo and video collection is large, a partial export will not serve as my archive. For around 25% of consumers, fitting the whole library and its growth is the primary need. |
| Device and transfer compatibility | Check which computers must read and write the drive, their connections, and the backup utility you plan to use. Confirm that cloud files have downloaded before copying them. | I need to move usable files between my chosen devices without finding that a backup utility cannot use the drive. Around 25% of consumers place that workflow first. |
| Shared access and privacy | For a NAS, check account permissions, upkeep and key storage for any encrypted folders. Synology says its encrypted shared folders require the key for later access. | If several people need a local library, I want to control who can open it without losing the ability to recover it. Shared access and privacy are the main concern for around 17% of consumers. |
Microsoft says OneDrive Files On-Demand can show online-only files that cannot be opened without an internet connection. A folder listing alone does not establish that its contents are ready to copy.
Make required folders available locally, wait for downloads to finish, then open a sample of files from the independent copy.
A drive left attached can be affected by an incident on the computer it protects. The National Cyber Security Centre recommends disconnecting a backup device when it is not in use.
Check the completed copy, safely eject the drive and store it securely. Keep another separate copy where appropriate.
Seagate recommends exFAT for exchanging files between PCs and Macs, but says it is not compatible with Time Machine. A format that suits manual transfers may therefore be wrong for the intended backup utility.
Choose the format for the task before copying files. If reformatting is necessary, move any files you need elsewhere first because formatting erases the drive.
A NAS centralises access but is still one storage location. Synology also says an encrypted shared folder cannot be accessed without its key.
Use a NAS for managed sharing only if you can maintain it, retain its keys securely and keep another independent copy.
Portable external storage for local archives and file transfer.
Portable SSD storage for people moving large files between compatible devices.
NAS storage for a centrally managed household photo and file library.
External drives for computer-connected local copies.
These external SSDs and hard drives are options for keeping a personal photo or file copy locally. Measure the full library before choosing a capacity, and plan another independent copy rather than relying on any single drive.
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Consider this external SSD if you regularly move a large local file copy. It has a USB Type-C 3.2 Gen 2 connection; check your devices, the drive format and whether 4 TB leaves enough room for future files.
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This portable SSD suits a local copy that needs to travel between compatible devices. Its title specifies USB 3.2 Gen 2 and read and write speeds of up to 1,050 and 1,000 MB/s; check connection compatibility, the magnetic attachment setup if you need it, and whether 2TB fits the full library.
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This external hard drive is an option for a periodically updated archive kept away from the computer between backups. Its title specifies USB 3.0; check the required drive format and whether 4TB covers the complete export and planned growth.
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Consider this Mac-oriented external hard drive for a larger local archive. Before using it across different computers or with a built-in backup utility, confirm the formatting and connection workflow; 5TB still needs to cover your own library and future additions.
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This portable SSD is an option when you want to carry a local file copy. Check that 2TB accommodates the complete library, and confirm its connection and formatting against the devices and backup software you will use.
Yes. Google Account Help says you can create and download an archive of data from Google products, including Photos. Check that the completed archive contains the files you need before relying on your external copy.
Apple Support says you can select Download Originals to this Mac to download the full-resolution photos and videos in an iCloud Photos library. Ensure the Mac has room for the download, then copy the files to external storage and check that the copy opens.
Not necessarily. Microsoft says Files On-Demand can display online-only files that take up no local storage and cannot be opened offline. Make required folders available on the device and let them download before copying them to independent storage.
exFAT is an option for exchanging files between Windows and Mac computers, according to Seagate. Seagate also says it is not compatible with Time Machine, so choose a format suited to that utility if the drive is dedicated to Mac backups.
Synology says the key is required to mount the encrypted shared folder and access its data later. Keep the key securely somewhere other than solely on the NAS, and retain a separate backup of important files.