We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black SanDisk Ultra CZ48 256GB USB 3.0 flash drive, compact rectangular shape with matte finish

SanDisk

SanDisk Ultra CZ48 256GB USB 3.0 flash drive

SKU CH-SAJH-RZQDT

A 256 GB USB 3.0 flash drive with read speeds up to 100 MB/s and 128-bit AES encryption

  • Total capacity256 GB
  • USB standardUSB 3.0
  • Max read speedup to 100 MB/s
  • Security features128bit AES Encryption
  • Product colorBlack
  • Key featuresMove Files Quickly with Faster Transfer Speeds With transfer
  • Up to 100MB/s read speed moves large files quickly
  • USB 3.0 interface transfers data up to ten times faster than USB 2.0
  • 128-bit AES encryption with included SecureAccess software protects private files
  • Compact 0.43" x 0.84" x 2.24" design fits easily in a pocket
  • 256GB capacity stores thousands of photos, videos and documents

What it is and who it serves

The SanDisk Ultra CZ48 is a 256GB USB 3.0 flash drive built for everyday file transport. It suits students and professionals who move documents, photos or videos between laptops and desktops without relying on cloud sync. The black retractable design fits in a pocket or on a key ring for constant availability. Read speeds reach 100MB/s so large transfers finish quickly.

What the bundled software changes

SanDisk SecureAccess software is included and enables 128-bit AES encryption with password protection for selected files. Users create a private vault on the drive that stays locked until the correct password is entered. The remaining capacity stays open for ordinary drag-and-drop sharing with colleagues or family. No separate installation media or licence key is required.

Build, connectors and daily implications

The drive uses a standard USB-A 3.0 connector that is backward compatible with USB 2.0 ports. Its compact dimensions of 0.43" x 0.84" x 2.24" and weight of 0.03 lb keep it unobtrusive in tight laptop bays or alongside other peripherals. A sliding mechanism protects the contacts when the drive is not in use, reducing the risk of bent pins during transport.

How it compares

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

Price $32.99
Typical for this category: the median of 1,099 items is $31.99.
Total capacity 256 GB
Higher than about 80% of the 746 comparable items (median 64 GB).
Price per TB $128.87 per TB
Cheaper than about 87% of the 600 comparable items (median $226.48 per TB).

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
Product lineUltra
Model nameSDCZ48-256G-U46
Total capacity256 GB
Product colorBlack
Performance
Max read speedup to 100 MB/s
Ports & slots
USB standardUSB 3.0
Size & build
Product dimensions0.43 in × 0.84 in × 2.24 in
Product weight0.03 lb (0.01 kg)
More details
Security features128bit AES Encryption

Questions about this item

How long will the 128-bit AES encryption and SanDisk SecureAccess software remain supported?

The 128-bit AES encryption is a hardware-level feature on the SDCZ48-256G-U46 that does not expire, while the included SecureAccess software can be reinstalled from SanDisk's website if a future OS update requires a newer version.

Does the USB 3.0 interface or the flash memory limit sustained write speeds first?

The flash memory is the limiting factor; the drive is rated for read speeds up to 100MB/s, while write speeds are only described as up to 10 times faster than standard USB 2.0 drives, making the memory the bottleneck during long transfers.

How hot does the metal casing get when transferring 256GB continuously?

The small 0.43" x 0.84" x 2.24" black plastic body has minimal surface area for heat dissipation, so the casing will become noticeably warm during sustained maximum-speed transfers of large files.

More in USB Thumb Drives

Similar items