SanDisk Ultra Fit USB 3.2 Flash Drive 128GB
- Memory Storage Capacity: 128 GB
- Hardware Interface: USB 3.2 Gen 1
- Hardware Connectivity Technology: USB Type A
- Number of Packs: 1
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact 128GB USB 3.2 drive built to live in a port rather than a pocket, with fast enough transfer speeds for large video files.
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ASIN: B0BY2WH7QBModel: SDCZ430-128G-GAM46Category: USB Flash Drives
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Overview
A 128GB USB 3.2 flash drive built to stay in the port rather than stick out, aimed at laptops, game consoles and car audio systems that need a permanent storage add-on. Read speeds up to 400MB/s make it fast enough for moving large video files without a long wait.
SanDisk pitches this drive on how little room it takes up: the low-profile body is designed to stay plugged into a laptop or console without catching on a bag or blocking an adjacent port. That is the main selling point over a standard flash drive, more than raw capacity. Optional password protection software is available as a separate download for Windows 10+ and macOS 10.9+, so encryption is not automatic out of the box.
- USB 3.2 Gen 1 with rated read speeds up to 400MB/s
- 128GB capacity
- Compact plug-and-stay body
- Optional 128-bit AES password protection software
Who it's for
Fits anyone who wants a drive to leave permanently in a USB port, such as a car stereo, game console or laptop, rather than carry loose. Less suited to people who need the drive to travel between many computers, since its low profile can make it harder to grip and remove.
Pros and cons
- Low-profile design stays in the port without sticking out
- Read speeds up to 400MB/s on USB 3.0+
- 128GB is enough for large video and photo libraries
- Optional password protection requires a separate software download
- Low profile can be harder to grip when removing
- Speed drops sharply on an older USB 2.0 port
Performance notes
Speed depends on a USB 3.2 Gen 1 or USB 3.0 host port; on an older USB 2.0 port the drive will still work but at a fraction of the rated speed. SanDisk quotes a 1.2GB movie transferring in under 30 seconds on a compatible port, and the 400MB/s figure is a read speed, not a write speed.
Specifications
| Brand | Sandisk |
|---|---|
| Model | SDCZ430-128G-GAM46 |
| Dimensions & fit | |
| Item Weight | 0.04 pounds |
| Item Dimensions D x W x H | 1.2 × 0.6 × 0.2 inches |
| Capacity & performance | |
| Memory Storage Capacity | 128 GBhigher than 53% of 88 usb flash drives |
| Read Speed | 400 megabytes_per_second |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Hardware Interface | USB 3.2 Gen 1 |
| Hardware Connectivity Technology | USB Type A |
| Connectivity Technology | USB |
| Compatible Devices | Laptop |
| Included components | |
| Number of Packs | 1 |
| Warranty & support | |
| Warranty Description | 5 years |
| Other details | |
| Flash Memory Type | USB |
| Number of Items | 1 |
| Mfr Part Number | SDCZ430-128G-GAM46 |
| Additional Features | Compact |
Closest rivals on specs
SamData USB Flash Drive with LED 32GB 2 Pack- Memory Storage Capacity 128 vs 32 GB (+300%)
- Item Weight 0.04 vs 0.03 pounds (+33%)
Lexar D40E Dual Type-C Flash Drive 128GB- Item Weight 0.04 vs 0.06 pounds (-33%)
Frequently asked questions
Does the SanDisk Ultra Fit work on a USB 2.0 port?
Yes, it is backward compatible with USB 2.0, but transfer speeds will be much slower than the rated 400MB/s, which requires a USB 3.0 or 3.2 port.
Is the password protection built in?
No. Encrypting files needs a separate downloadable software tool from SanDisk, supported on Windows 10 and later and macOS 10.9 and later.
How much usable space does the 128GB model actually have?
Less than 128GB as advertised, since capacity is measured as 1GB equals 1,000,000,000 bytes and some space goes to formatting overhead.