Best USB Flash Drives Compared in 2026

These five drives are compared on capacity, connector, interface and explicit security features. Capacities range from 16 GB to 256 GB, and interfaces span USB 3.2 Gen 1 and USB 2.0 depending on the model, so buyers should check which applies to their intended use. Security features also vary widely, from drives with no stated encryption through to models listing specific certifications such as FIPS and MIL-STD ratings.

5 selected productsListing snapshot 23 October 2026Selection Editorial

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PC Hardware Compare editorial teamProduct information editor

Winner

SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A

The SanDisk Ultra Dual Drive USB Type-C at £29.74 is the lowest priced option here and a practical starting point for general storage, rather than a pick for every use case.

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Product	Brand	Price	Retailers	Memory capacity	Listed product details	Interface
SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A	Sandisk	£29.74	PCHub	128 GB	SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Silver	Not listed
Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Typ	Team Group	£36.09	PCHub	256 GB	Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Grey	USB 3.2
Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type-	Silicon Power	£54.79	PCHub	128 GB	Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Grey. Silver	Not listed
iStorage datAshur PRO 16 GB \| Secure Flash Drive \| FIPS 140-2 Level 3	iStorage	£81.96	PCHub	16 GB	iStorage datAshur PRO 16 GB \| Secure Flash Drive \| FIPS 140-2 Level 3 Certified\| NLNCSA DEP-V Certified \| NATO Restricted Certified \|AES-XTS 256-bit Hardware Encryption \| PIN protected \| Dust/Water Resistant	Not listed
DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES	DataLocker	£207.08	PCHub	128 GB	DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES 256-bit. MIL-STD-810G. Display with Keypad. USB A Connector compatible with 3.2 Gen 1 & USB 2.0	USB 2.0

1. SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A

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Price shown £29.74

A 128 GB drive with USB Type-A and Type-C connectors, using the USB 3.2 Gen 1 interface.

The SanDisk Ultra Dual Drive USB Type-C offers 128 GB of capacity with both USB Type-A and Type-C connectors, using the USB 3.2 Gen 1 interface.

It is finished in black and silver, with no explicit security features listed for this model.

Benchmark

Geekbench does not benchmark the primary function of SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A. Its scores measure the processor or graphics device in the test computer, not this product.

Browse Geekbench Community Results

Removable storage performance testing

Measure sequential and small-file read and write speeds through the same host and interface. Security certification does not indicate transfer performance.

A comparable third-party result for SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A is not included here. See CrystalDiskMark test description explains the relevant test or benchmark method.

At £29.74 this is the cheapest drive in the roundup.

Product specifications
Specification	Information
Brand	Sandisk
Price	£29.74
Memory capacity	128 GB
Listed product details	SanDisk Ultra Dual Drive USB Type-C USB flash drive 128 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Silver

Compatible hardware

Check against LaptopsCheck the device has a matching USB connector or card slot and supports the storage format.
Check against Desktop PCsMatch USB connector type and speed to an available PC port.
Check against POS terminals and systemsConfirm the terminal supports the drive interface and intended file system.

What we like

Lowest price in the roundup
Dual Type-A and Type-C connectors
USB 3.2 Gen 1 interface

What we don't like

No explicit security features listed
Lower capacity than the 256 GB Team Group X1

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2. Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Typ

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Price shown £36.09

A 256 GB drive with USB Type-A and Type-C connectors, using the USB 3.2 Gen 1 interface.

The Team Group X1 offers 256 GB of capacity, the highest listed in this roundup, with both USB Type-A and Type-C connectors.

It uses the USB 3.2 Gen 1 interface and is finished in black and grey, with no explicit security features listed for this model.

Benchmark

Geekbench does not benchmark the primary function of Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Typ. Its scores measure the processor or graphics device in the test computer, not this product.

Browse Geekbench Community Results

Removable storage performance testing

Measure sequential and small-file read and write speeds through the same host and interface. Security certification does not indicate transfer performance.

A comparable third-party result for Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Typ is not included here. See CrystalDiskMark test description explains the relevant test or benchmark method.

At £36.09 this is the second cheapest drive in the roundup.

Product specifications
Specification	Information
Brand	Team Group
Price	£36.09
Memory capacity	256 GB
Interface	USB 3.2
Listed product details	Team Group X1 USB 3.2 Gen1 USB flash drive 256 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Grey

Compatible hardware

Check against LaptopsCheck the device has a matching USB connector or card slot and supports the storage format.
Check against Desktop PCsMatch USB connector type and speed to an available PC port.
Check against POS terminals and systemsConfirm the terminal supports the drive interface and intended file system.

What we like

Highest capacity in the roundup
Dual Type-A and Type-C connectors
Low price relative to its capacity

What we don't like

No explicit security features listed
No display or keypad is listed, unlike the DataLocker drive

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3. Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type-

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Price shown £54.79

A 128 GB drive with USB Type-A and Type-C connectors, using the USB 3.2 Gen 1 interface.

The Silicon Power Mobile C31 offers 128 GB of capacity with both USB Type-A and Type-C connectors, using the USB 3.2 Gen 1 interface.

It is finished in black, grey and silver, offering the widest range of colour options listed in this roundup, with no explicit security features stated.

Benchmark

Geekbench does not benchmark the primary function of Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type-. Its scores measure the processor or graphics device in the test computer, not this product.

Browse Geekbench Community Results

Removable storage performance testing

Measure sequential and small-file read and write speeds through the same host and interface. Security certification does not indicate transfer performance.

A comparable third-party result for Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type- is not included here. See CrystalDiskMark test description explains the relevant test or benchmark method.

At £54.79 it costs more than the SanDisk and Team Group models while listing the same 128 GB capacity as the SanDisk.

Product specifications
Specification	Information
Brand	Silicon Power
Price	£54.79
Memory capacity	128 GB
Listed product details	Silicon Power Mobile C31 USB flash drive 128 GB USB Type-A / USB Type-C 3.2 Gen 1 (3.1 Gen 1) Black. Grey. Silver

Compatible hardware

Check against LaptopsCheck the device has a matching USB connector or card slot and supports the storage format.
Check against Desktop PCsMatch USB connector type and speed to an available PC port.
Check against POS terminals and systemsConfirm the terminal supports the drive interface and intended file system.

What we like

Black, grey and silver finish options
Dual Type-A and Type-C connectors
USB 3.2 Gen 1 interface

What we don't like

No explicit security features listed
Lower capacity than the Team Group and DataLocker units

Check price at PCHub

4. iStorage datAshur PRO 16 GB | Secure Flash Drive | FIPS 140-2 Level 3

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Price shown £81.96

A 16 GB drive with FIPS 140-2 Level 3, NLNCSA DEP-V and NATO Restricted certifications, with AES-XTS 256-bit hardware encryption and PIN protection.

The iStorage datAshur PRO offers 16 GB of capacity, the lowest in this roundup, with FIPS 140-2 Level 3, NLNCSA DEP-V and NATO Restricted certifications listed.

It features AES-XTS 256-bit hardware encryption, PIN protection and a dust and water resistant build, with no connector or interface details stated.

Benchmark

Geekbench does not benchmark the primary function of iStorage datAshur PRO 16 GB | Secure Flash Drive | FIPS 140-2 Level 3. Its scores measure the processor or graphics device in the test computer, not this product.

Browse Geekbench Community Results

Removable storage performance testing

Measure sequential and small-file read and write speeds through the same host and interface. Security certification does not indicate transfer performance.

A comparable third-party result for iStorage datAshur PRO 16 GB | Secure Flash Drive | FIPS 140-2 Level 3 is not included here. See CrystalDiskMark test description explains the relevant test or benchmark method.

At £81.96 this is priced below the DataLocker unit despite its lower capacity.

Product specifications
Specification	Information
Brand	iStorage
Price	£81.96
Memory capacity	16 GB
Listed product details	iStorage datAshur PRO 16 GB \| Secure Flash Drive \| FIPS 140-2 Level 3 Certified\| NLNCSA DEP-V Certified \| NATO Restricted Certified \|AES-XTS 256-bit Hardware Encryption \| PIN protected \| Dust/Water Resistant

Compatible hardware

Check against LaptopsCheck the device has a matching USB connector or card slot and supports the storage format.
Check against Desktop PCsMatch USB connector type and speed to an available PC port.
Check against POS terminals and systemsConfirm the terminal supports the drive interface and intended file system.

What we like

Multiple explicit security certifications listed
AES-XTS 256-bit hardware encryption with PIN protection
Dust and water resistant build stated

What we don't like

Lowest capacity in the roundup
No connector or interface details listed

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5. DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES

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Price shown £207.08

A 128 GB drive with FIPS 140-3 Level 3 and MIL-STD-810G listings, AES 256-bit encryption, a display with keypad and a USB-A connector compatible with USB 3.2 Gen 1 and USB 2.0.

The DataLocker Sentry K350 offers 128 GB of capacity with FIPS 140-3 Level 3 and MIL-STD-810G listings, alongside AES 256-bit encryption.

It includes a display with keypad and a USB-A connector listed as compatible with both USB 3.2 Gen 1 and USB 2.0, with the listing identifying USB 2.0 as its interface.

Benchmark

Geekbench does not benchmark the primary function of DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES. Its scores measure the processor or graphics device in the test computer, not this product.

Browse Geekbench Community Results

Removable storage performance testing

Measure sequential and small-file read and write speeds through the same host and interface. Security certification does not indicate transfer performance.

A comparable third-party result for DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES is not included here. See CrystalDiskMark test description explains the relevant test or benchmark method.

At £207.08 this is the most expensive drive in the roundup.

Product specifications
Specification	Information
Brand	DataLocker
Price	£207.08
Memory capacity	128 GB
Interface	USB 2.0
Listed product details	DataLocker Sentry K350 128 GB Encrypted USB Drive. FIPS 140-3 L3. AES 256-bit. MIL-STD-810G. Display with Keypad. USB A Connector compatible with 3.2 Gen 1 & USB 2.0

Compatible hardware

Check against LaptopsCheck the device has a matching USB connector or card slot and supports the storage format.
Check against Desktop PCsMatch USB connector type and speed to an available PC port.
Check against POS terminals and systemsConfirm the terminal supports the drive interface and intended file system.

What we like

Display with keypad included
FIPS 140-3 Level 3 and MIL-STD-810G listings
AES 256-bit encryption

What we don't like

Highest price in the roundup
Listing identifies USB 2.0 as the interface

Check price at PCHub

Prices shown reflect the available listing details and can change. Check stock, delivery, compatibility and full product specifications with PCHub before ordering.