
SanDisk
SanDisk SDCZ73-064G-A46 64GB Ultra Flair USB 3.0 Flash Drive
USB 3.0
150MB/s read speeds over USB 3.0 in a metal-encased 64GB drive that fits your keychain and password-protects your files.
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Overview
Key Features
Fly through file transfers
Stylish and tough
Password-protect your files
Specifications
Capacity
64GB
Interface
USB 3.0 (backward compatible with USB 2.0)
Read Speed
Up to 150MB/s
Write Speed
Not specified by manufacturer
Housing
All-Metal
Security
128-bit AES password protection (SanDisk SecureAccess)
Color
Silver/Black
Brand
SanDisk
Model
SDCZ73-064G-A46
Frequently Asked Questions
What's the actual read performance difference between this drive and a USB 2.0 flash drive?
USB 3.0 delivers a theoretical bandwidth ceiling of 5Gbps versus USB 2.0's 480Mbps — roughly 10x the raw interface bandwidth. The SDCZ73's 150MB/s read speed is approximately 15–20x faster than a typical USB 2.0 drive in practice, reducing the time to copy a 4GB video file from several minutes to under 30 seconds.
Is the Ultra Flair backward compatible with USB 2.0 ports?
Yes. The SDCZ73 is fully backward compatible with USB 2.0 ports. At USB 2.0 speeds the drive will be limited to the port's bandwidth ceiling (approximately 40–60MB/s practical throughput) rather than its 150MB/s rated speed, but all functionality is retained.
What software is required to use the password protection feature?
SanDisk SecureAccess software enables 128-bit AES encrypted password protection on a private vault partition. The software runs from the drive itself without installation on the host machine, making it compatible with machines where you cannot install software — though the vault is only accessible from the SecureAccess application.
Is the metal casing durable enough for everyday keychain or bag carry?
The all-metal housing resists the flex and crack failure modes that plague plastic-cased flash drives. The retractable or sliding connector design (depending on variant) protects the USB plug from damage during pocket and bag carry. It is not rated waterproof, however — liquid exposure to the USB connector remains a risk.
What write speeds can I expect from this drive, and does SanDisk publish that specification?
SanDisk publishes only the read speed of 150MB/s for the Ultra Flair — write speed is not officially specified. In third-party testing, write speeds typically land in the 30–70MB/s range depending on file size and type. For write-heavy workflows like daily backup of large files, a higher-tier drive with published write specifications would better serve the use case.