SanDisk 256GB Ultra Flair USB 3.0 Flash Drive – Metal High-Speed USB Stick – Silver/Black

150MB/s Read · USB 3.0

Why Read Speed Matters on a USB Drive

The 150MB/s read speed specification determines how fast files can be read from the drive — opening files directly from the drive, copying files from the drive to a computer, or loading an operating system or application stored on the drive. At 150MB/s, a 4GB video file copies from the drive to a laptop in approximately 27 seconds; the same file at 10MB/s USB 2.0 speed would take just under 7 minutes. The practical impact is most noticeable when copying large numbers of files or large individual files — for small documents and occasional casual use, the speed difference between USB 2.0 and USB 3.0 is less meaningful. USB 3.0 and USB 3.2 Gen 1 are the same standard — the same 5Gbps maximum bandwidth, the same physical connector. USB 3.0 was rebranded USB 3.2 Gen 1 in 2019. The Ultra Flair is backward compatible with USB 2.0 ports and will connect to any USB-A port on any device manufactured in the last 20 years, operating at the port’s supported speed. Write speed on the Ultra Flair is lower than read speed — typical real-world write speeds are in the range of 40–60MB/s for large sequential files at 256GB capacity, still substantially faster than USB 2.0 drives.

Metal Casing · Build Quality

Why the Ultra Flair Costs More Than the Ultra

SanDisk’s USB drive range includes the plastic-bodied Ultra (CZ48 and CZ48) and the metal-bodied Ultra Flair (CZ73). The performance specifications are similar — both offer up to 150MB/s read. The Ultra Flair’s premium is the casing material. USB flash drives are subjected to significant mechanical stress in everyday use — they are removed and inserted repeatedly, carried loose in pockets where they flex and knock against keys and coins, and occasionally dropped. Plastic casings crack and break under repeated flex stress; the USB connector can become loose from the body after extended use. The Ultra Flair’s metal casing distributes impact and flex loads across the full housing, resisting the cracking and deformation that affects plastic-bodied drives. The sliding metal cap protects the USB connector when not in use, replacing the separate cap that is commonly lost on conventional flash drives — the cap is integrated into the drive’s slide mechanism and cannot be misplaced. The silver and black finish is visually distinctive from generic plastic drives and reflects SanDisk’s positioning of the Ultra Flair as the premium option in their flash drive range.

SecureAccess · 128-bit AES

Password Protection for Private Files

SanDisk SecureAccess is a software application that installs from the drive and creates an encrypted folder — a vault — on the Ultra Flair. Files placed inside the vault are encrypted using 128-bit AES encryption and are only accessible by entering the correct password. Files stored outside the vault are not encrypted and remain accessible without a password. This two-tier structure allows the drive to carry both accessible files (documents, photos, presentations that anyone can open) and private files (sensitive documents, credentials, confidential work files) on the same drive, with the private files secured behind a password. 128-bit AES is the encryption standard used by financial institutions and government agencies — it is computationally infeasible to brute-force decrypt, meaning the vault’s security is limited only by the strength of the password chosen. SecureAccess software is available for Windows 7, 8, 10, 11 and macOS 10.9 and later — a software download is required for Mac use. The vault password cannot be recovered if forgotten — files in the vault become permanently inaccessible without the correct password, so keeping a secure record of the password is important.

Right choice if you…

✔ Transfer large files regularly and want USB 3.0 speed — 150MB/s read makes a practical difference for files above 1GB
✔ Want a durable drive for daily carry — metal casing handles pocket and bag use better than plastic-bodied alternatives
✔ Need a slide-cover connector — no separate cap to lose, connector protected when closed
✔ Need optional password protection for sensitive files — SecureAccess vault available on the same drive

Consider something else if…

✖ You need USB-C connectivity — the Ultra Flair is USB-A only; a USB-A to USB-C adapter is required for USB-C-only laptops and tablets
✖ You need very high write speeds for large ongoing backups — consider SanDisk Extreme Pro USB 3.2 for 420MB/s write
✖ You need waterproof protection — the Ultra Flair is not rated for water submersion; the SanDisk Extreme Go has waterproofing

Technical Specifications

In the Box

Frequently Asked Questions

Will this work with a USB-C laptop?

The Ultra Flair uses a USB-A connector. Most USB-C laptops (MacBook, Dell XPS, Surface) have at least one USB-A port alongside USB-C. If your laptop has USB-C only, a USB-A to USB-C adapter connects the drive without any performance loss — the drive operates at full USB 3.0 speeds through the adapter. A USB hub with USB-A ports is the alternative for permanent desk use.

What is the actual write speed?

SanDisk specifies read speed (150MB/s) but not write speed for the Ultra Flair — write speed is lower than read. Real-world benchmarks for the 256GB Ultra Flair show sequential write speeds typically in the 40–60MB/s range for large files. This is substantially faster than USB 2.0 (8–10MB/s write) but lower than the read speed. For copying files onto the drive, allow more time than copying files off it.

Does SanDisk SecureAccess work on Mac?

Yes — SecureAccess supports macOS 10.9 and later, but a software download is required for Mac. On Windows, SecureAccess launches directly from the drive. Visit SanDisk’s SecureAccess support page to download the Mac version. Once installed, the vault works identically on both platforms — files encrypted on Windows are accessible on Mac with the same password.

Is the Ultra Flair waterproof?

No — the Ultra Flair is not rated for water exposure. The metal casing provides impact and flex resistance, but the drive is not sealed against water ingress. Accidental brief splashes may not cause damage, but submersion or prolonged moisture exposure is not recommended. For waterproof flash drive options, the SanDisk Extreme Go has a water-resistant design.

Condition

Brand New — Retail Packaging

Warranty

5 Years · SanDisk Limited

Delivery

4–5 Working Days · Fully Tracked

Also Available at maibo