Flash drives aren't the first device you think about when considering the current sky-high cost of RAM and storage, but they've certainly been affected. Thanks to AI and data center demand, NAND flash prices have risen significantly. USB drives haven't absorbed those increases dollar for dollar, but cheap flash memory can no longer be taken for granted either. That makes the price difference between various flash drives more interesting. While two drives of the same capacity may cost vastly different amounts, usually the extra cost brings something you'll notice: faster transfers, stronger security or hardware better suited to life outside a desk drawer.

Faster transfers are a clear benefit of spending more. The Kingston Data Traveler Max rates up to 1,000 MB/s reads and 900 MB/s writes. In a 10GB transfer test, Tom's Hardware measured Samsung's cheaper Fit Plus at 319.7 MB/s reads and just 58.4 MB/s writes. That gap won't matter much when copying a PDF, but a folder full of 4K video is a different matter. The Kingston Iron Key Keypad 200 focuses on security instead of speed, featuring a physical keypad, XTS-AES 256-bit hardware encryption, and FIPS 140-3 Level 3 validation. These advanced features protect the device from physical tampering and technical attacks.

Capacity can push up the price too. While you can find 2TB flash drives, packing more storage onto your keyring doesn't guarantee strong performance. The tiny 1TB San Disk Extreme Fit measured 318.3 MB/s reads and just 82.52 MB/s writes. It also came close to blocking the adjacent USB-C port on the reviewer's laptop. Ruggedness is another factor, with drives designed to withstand drops and extreme temperatures often commanding a premium over standard models.