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Black rectangular USB 3.0 flash drive with retractable connector, compact size

SanDisk

SanDisk SDCZ48-128G-A46 128GB USB 3.0 flash drive

SKU CH-Z7MX-HAJGR MPN SDCZ48-128G-A46

128 GB USB 3.0 flash drive with up to 100 MB/s read and 80 MB/s write speeds, plus password-protected encryption

  • USB standardUsb3.0
  • Max read speed100 unknown modifier
  • Write throughput80 MB/s
  • Security featuresCompact
  • Product colorBlack
  • Key featuresSold as 1 Each.
  • 128 GB capacity stores large media libraries
  • Up to 100 MB/s read speed moves files quickly
  • Up to 80 MB/s write speed saves transfer time
  • USB 3.0 interface enables faster throughput than USB 2.0
  • Compact 4.8 × 0.5 × 3.2 in design fits any bag

128 GB USB 3.0 flash drive

The SanDisk Ultra SDCZ48-128G-A46 provides 128 GB of portable storage with a USB 3.0 interface. It delivers read speeds up to 100 and write speeds up to 80 MB/s. The compact black casing measures 4.8 by 0.5 by 3.2 inches and weighs 0.02 pounds. It is sold as a single unit for everyday file transport.

Build integration and freedoms

The drive plugs directly into any USB 3.0 or 2.0 port without extra cables or power adapters. Its small footprint leaves adjacent ports unobstructed on crowded hubs or laptop sides. SanDisk SecureAccess software creates a password-protected folder with 128-bit AES encryption for sensitive files. The lightweight design adds negligible bulk to a keyring or pocket.

Who this suits and who should look elsewhere

Professionals and hobbyists needing fast, encrypted portable storage for media libraries and documents will find the capacity and speed adequate. Buyers who require higher sustained write throughput for large video projects should consider other options. Users wanting ruggedised water or shock resistance need a different drive. Anyone needing more than 128 GB of capacity must select a larger model.

How it compares

Measured against everything we stock in USB Thumb Drives, at today’s prices. Recalculated every night.

Price $84.99
Pricier than about 76% of the 1,099 comparable items (median $31.99).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSanDisk
Model nameSanDisk Ultra
Part numberSDCZ48-128G-A46
Product colorBlack
Performance
Max read speed100 unknown modifier
Write throughput80 MB/s
Ports & slots
USB standardUsb3.0
Size & build
Product dimensions4.8 L × 0.5 W × 3.2 H inches
Product weight0.02 lb (0.01 kg)
Shipping weight0.45 kg
Package size25 × 25 × 25 mm
More details
Security featuresCompact

Questions about this item

At what write speed will large transfers settle after the initial burst on this SanDisk Ultra 128GB drive?

Sustained large-file writes run at up to 80 MB/s on the SDCZ48-128G-A46, so the initial burst drops to that rate once the cache fills.

How warm does the SDCZ48-128G-A46 get and how much power does it draw during all-day transfers?

The metal casing stays only slightly warm and the drive draws standard USB 3.0 bus power with no external supply needed.

Which port and operating-system support must my computer already have for the SanDisk Ultra 128GB to work at its rated speed?

A USB 3.0 Type-A port and any modern OS with native mass-storage drivers will deliver the full 100 MB/s read and 80 MB/s write.

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