Choose a dual-connector USB flash drive for occasional documents and modest media transfers across Type-A and Type-C devices, and consider a portable SSD when repeated multi-gigabyte copies make write speed and physical durability more important. An encrypted removable drive suits sensitive files carried in person, while cloud sharing is more suitable for remote access when account security and sharing permissions are checked carefully.
For moving coursework, documents, presentations and media between home, campus and workplace computers where Type-A/Type-C compatibility and simple direct transfer matter. Which? and Samsung UK provide relevant context on connector and portable-storage differences.
For people repeatedly moving video, photo or project folders who need to consider practical transfer performance, cable and host capability, and a device that is easier to carry between locations. This reflects USB-IF guidance, Samsung UK specifications and Which? external-storage testing.
For anyone using an offline transfer route who needs risk-appropriate encryption and access control in case a removable device is lost or accessed by someone else. The Information Commissioner’s Office and Kingston provide relevant guidance and product examples.
Start with the devices at both ends of the transfer, then match the storage route to file size, transfer frequency and the sensitivity of the files.
| Priority | What to check | Your needs |
|---|---|---|
| Large-file transfer time | Compare the exact model’s stated write speed, not only its read speed. Check the capacity variant and whether the host and cable support the required USB mode. | I move multi-gigabyte media or project folders regularly and do not want routine copies to take unnecessarily long. A portable SSD can be the more suitable route when repeated writing and carrying are priorities. |
| Connector and protocol fit | List Type-A and Type-C ports on every endpoint. Confirm USB mass-storage support, the USB data capability of each port and the cable specification; USB-IF states that connections operate at the lowest common capability. | I need to connect directly to older and newer devices without discovering too late that I need a different cable or adapter. |
| Protection for sensitive files | Check whether encryption and PIN or biometric access apply to the exact drive. Confirm supported operating systems, access recovery behaviour and the consequences of repeated failed sign-in attempts. | I carry files that would cause problems if a lost drive could be opened. The Information Commissioner’s Office identifies encryption as an appropriate protective measure for personal information stored on removable media. |
| Remote sharing controls | Confirm the service’s per-file limit, available account storage and sharing permissions. Use the least-open access setting that meets the recipient’s need and protect the account with a unique, strong password. | I need someone in another location to receive or work from files without a physical handover, while keeping control over who can view or edit them. |
A Type-C plug does not establish the available USB data rate. USB-IF explains that USB 3.2 has different transfer-rate tiers, and even a fast portable SSD is limited by the host, cable and lowest common connection capability.
List every sending and receiving device before choosing. Check Type-A or Type-C ports, USB mass-storage support and the data capability of both the ports and cable; then choose a dual-connector drive or suitable cable.
An adapter or replacement cable may be needed when the drive does not directly fit every device.
Writing files onto a drive depends primarily on write performance, which can be lower than its read figure and can vary with the drive, capacity variant and host configuration.
When moving large folders out to a drive, compare the exact model’s stated write speed. For repeated large-file work, confirm that the host and cable can support the SSD’s specified USB mode.
Samsung says its T7 Shield protection claims are based on controlled tests and can vary in real conditions. A ruggedness rating is not permission to submerge, bend, disassemble or expose a drive to extreme conditions.
Use protection claims as one comparison point and keep another copy of important files outside the transfer workflow.
Liquid or dust damage may not be covered by warranty, depending on the product terms.
Public sharing settings can allow unrestricted viewing, while cloud files are held on provider-controlled infrastructure. The Information Commissioner’s Office distinguishes private, invited-user and public access settings.
Before sending a link, confirm who needs access, use a private or invited-user setting where suitable, review the recipient list and secure the account with a unique, strong password.
A portable SSD option for users prioritising high stated sequential transfer performance and a physically robust device for moving files. Samsung UK covers the 1TB T7 Shield model MU-PE1T0S/EU.
Relevant for low-friction dual-connector flash drives and security-oriented encrypted storage, including DataTraveler and IronKey product lines.
A USB-stick and portable-storage brand included in Which? UK consumer testing, useful to compare when choosing capacity, connector type or performance characteristics.
Joybuy options for physical transfer of large files between devices, including portable SSDs for compatible high-throughput workflows and a dual-connector encrypted flash drive for sensitive files.
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For repeated multi-gigabyte transfers where a portable SSD workflow and mixed-port computer connections are needed.
Stated 1TB capacity, USB Type-C and USB 3.2 Gen 2, with USB-C-to-C and USB-C-to-A cables included.
Samsung states up to 1,050MB/s read and 1,000MB/s write; these maximum figures require a compatible USB 3.2 Gen 2 host, suitable cable and UASP. Check each endpoint’s USB mass-storage support and data capability.
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For moving large folders between computers and compatible USB-C devices where both USB-C-to-C and USB-A-to-C cables are useful.
Stated 1TB capacity, USB 3.2 Gen 2 and up to 1,050MB/s read and 1,000MB/s write.
Magnetic attachment for iPhone 15/16 requires the supplied silicone case or magnetic ring, and wireless MagSafe charging is not supported. Check the exact security method before relying on it for sensitive files.
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For USB-C creator workflows moving large media or project folders, including compatible mobile recording setups.
Stated 1TB capacity, USB 3.2 Gen 2x2 Type-C interface, up to 2,000MB/s read and 1,800MB/s write.
The magnetic iPhone function is limited to iPhone 15/16 Pro and Pro Max models. Confirm cable inclusion and the connection method needed for USB-A devices before buying.
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For frequent large-file transfers in a compatible USB-C workflow, particularly where stated high write speed is a priority.
Stated 1TB capacity, USB-C, USB 3.2 Gen 2x2, up to 2,060MB/s read and 1,800MB/s write.
Confirm the exact iPhone connection method and supported models, as well as cable inclusion and any USB-A connection requirement. Maximum performance depends on compatible host and cable capability.
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For carrying sensitive files between older USB-A and newer Type-C devices in a compact physical-transfer format.
Stated 256GB capacity, USB 3.2 Gen 1 dual USB-A and Type-C interfaces, AES-256 encryption, fingerprint access, up to 550MB/s read and 500MB/s write.
Check the required free capacity for large media libraries and confirm supported platforms, fingerprint enrolment and recovery behaviour before relying on the encrypted access method.
No. Type-C describes the connector shape, not a guaranteed data rate. USB-IF states that USB 3.2 has 5Gbps, 10Gbps and 20Gbps transfer-rate tiers, and the drive, cable and endpoints operate at the lowest common capability.
Consider a portable SSD when you repeatedly copy multi-gigabyte files, move large video or photo folders, work directly from external storage or need a more durable device for carrying. Which? identifies substantial differences in USB-stick transfer performance, heat and durability, while portable SSD performance still depends on the exact drive, cable and host.
For organisations handling personal information, security measures should be appropriate to risk; the Information Commissioner’s Office describes encryption as an appropriate measure rather than a blanket requirement for every file. The ICO specifically advises using encryption to protect personal information on removable media, and employer, university or client policies may add further requirements.
It can, provided the account has enough storage, the connection is suitable and the service accepts the individual file size. The Information Commissioner’s Office notes that cloud services support access and sharing across devices and locations; Microsoft documents a 250GB per-file browser upload limit for OneDrive, so check the specific service and plan before relying on it.
Use the least-open setting that still lets the intended recipient work with the file. The Information Commissioner’s Office distinguishes private access, sharing limited to invited people and public access without restriction; review recipients before sending and use a unique, strong account password.