SanDisk 64GB Ultra USB 3.0 Flash Drive - SDCZ48-064G-UAM46
Bottom line: The SanDisk 64GB Ultra USB 3.0 Flash Drive ($19.95 on Amazon as of 2026-10-21 00:15 UTC): Read speeds up to 100MB/s over USB 3.0; main trade-off: only read speed is rated; write speed is not specified.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Read speeds up to 100MB/s over USB 3.0
- ✓ SanDisk SecureAccess creates a password-protected file vault
- ✓ Backward compatible with older USB 2.0 ports
- ✓ 64GB holds large photo, video, or install-media sets
Cons
- ✗ Only read speed is rated; write speed is not specified
- ✗ Drops to USB 2.0 speeds on non-3.0 ports
- ✗ Operating range stops at 113F, limiting hot-car storage
- ✗ No stated waterproof, shockproof, or ruggedized rating
Manufacturer description
The SanDisk 64GB Ultra USB 3.0 Flash Drive (SDCZ48-064G-UAM46) is a pocket-sized storage stick built for people who move large files between machines regularly. Read speeds reach up to 100MB/s, which turns a folder of photos, a video project, or a game install that used to take several minutes into a much shorter wait. That speed depends on the port you plug into: connect to a genuine USB 3.0 port and you get the full rating, while a USB 2.0 port still works but throttles transfers to 2.0 speeds. The 64GB capacity handles a working set of documents, RAW photos, install media, or a portable…
SpecPicks Verdict
SpecPicks scored SanDisk 64GB Ultra USB 3.0 Flash Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the PC & gaming hardware category. SanDisk's PC & gaming hardware lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for PC & gaming hardware of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How fast is the SanDisk 64GB Ultra USB 3.0 drive?
SanDisk rates read speeds at up to 100MB/s. That figure applies when the drive is connected to a USB 3.0 port; write speed is not published for this model.
Will it work in a USB 2.0 port?
Yes. The drive is compatible with both USB 3.0 and USB 2.0. On a 2.0 port it still functions, but transfer speeds fall to USB 2.0 levels rather than the rated 100MB/s.
Can I password-protect files on this drive?
Yes. SanDisk SecureAccess software is included and creates a private, password-protected area on the drive for sensitive files.
Is 64GB enough capacity for my use?
64GB fits roughly a large RAW photo shoot, several HD video projects, bootable install media, or a portable document and game-save library. Heavy 4K video workflows will fill it faster.
What temperatures can this flash drive handle?
The rated operating range is 32 to 113 degrees Fahrenheit (0 to 45 Celsius). Avoid leaving it in a hot parked car, which can exceed the upper limit.
Key Features
- Performance/speed: Read speeds up to 100MB/s
- Compatibility: USB 3.0 and USB 2.0
- SanDisk Secure Access Software Keeps Files Private
- Operating temperature-32 - 113 degree Fahrenheit (0 – 45 degree Celsius)
Full Specifications
| Brand | Sandisk |
|---|---|
| Color | black |
| Weight | 064g |
| Model Name | Ultra |
| Read Speed | 100 Megabytes Per Second |
| Write Speed | 40MB/s |
| Connectivity | USB |
| Model Number | SDCZ48-064G-UAM46 |
| Compatibility | USB 3.0 and USB 2.0 |
| Special Feature | Lightweight |
| Flash Memory Type | USB |
| Performance/speed | Read speeds up to 100MB/s |
| Compatible Devices | Computers (Desktops & Laptops), Tablets, USB-enabled Smartphones |
| Hardware Interface | USB 3.0 |
| Additional Features | Lightweight |
| Connectivity Technology | USB |
| Memory Storage Capacity | 64 GB |
| Global Trade Identification Number | 00619659121754, 00619659152444, 00885782162074 |
Ready to buy?
SanDisk 64GB Ultra USB 3.0 Flash Drive - SDCZ48-064G-UAM46 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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