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SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive — main product image
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive
SanDisk

SanDisk SDCZ48-256G-GAM46 256GB Ultra USB 3.0 Flash Drive

★★★★★4.7 (43739 reviews)
USB 3.0USB 2.0

Store and transfer large files at high speed with 256GB of portable USB 3.0 storage from SanDisk.

$41.98*$67.99Save 38%
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jun 03, 2026.Price and availability are subject to change.

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Overview

The SanDisk SDCZ48-256G-GAM46 Ultra USB 3.0 Flash Drive packs 256GB of storage into a slim, portable form factor that slips easily into a pocket or laptop bag. With read speeds up to 130MB/s over USB 3.0, transferring large files such as HD video, photo libraries, or project backups takes a fraction of the time compared to standard USB 2.0 drives. The drive is also fully backward compatible with USB 2.0 ports, so it works seamlessly across older and newer systems alike.

Security-conscious users will appreciate the included SanDisk SecureAccess software, which provides 128-bit AES file encryption and password protection to keep private documents safe. Whether you are a student shuttling coursework between computers, a professional backing up critical files, or a traveler carrying media for offline entertainment, this drive delivers the capacity, speed, and reliability that SanDisk is known for in a no-fuss package.

Key Features

Transfer speeds up to 10x faster than standard USB 2.0 drives (4MB/s); up to 130MB/s read speed; USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes

Backward compatible with USB 2.0

Secure file encryption and password protection(2)

Specifications

Brand
SanDisk
Model
SDCZ48-256G-GAM46
Capacity
256GB
Interface
USB 3.0
Backward Compatibility
USB 2.0
Read Speed
Up to 130MB/s
Security
Secure file encryption and password protection
Compatibility
PC, Mac

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Pros & Cons

👍 Pros

  • 256GB capacity handles large file collections, backups, and media libraries
  • Read speeds up to 130MB/s dramatically reduce transfer wait times compared to USB 2.0
  • Built-in encryption and password protection software secures sensitive files
  • Backward compatible with USB 2.0 for use with older computers
  • Compact, pocket-friendly design for easy portability

👎 Cons

  • Write speeds are notably slower than the advertised read speeds
  • No cap or cover to protect the USB connector from dust and damage
  • The retractable design can feel loose over time with heavy use
  • No USB-C connector, requiring an adapter for newer devices without USB-A ports

Frequently Asked Questions

The drive delivers read speeds up to 130MB/s when connected to a USB 3.0 port. Actual speeds may vary depending on your host device and file types.
Yes, the SDCZ48-256G is backward compatible with USB 2.0 ports, though transfer speeds will be limited to USB 2.0 rates.
Yes, it includes SanDisk SecureAccess software for secure file encryption and password protection, allowing you to keep sensitive files private.
Yes, it is compatible with both PC and Mac computers out of the box.

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