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Small silver and black USB flash drive with retractable connector

SanDisk

SanDisk SDIX40N-128G iXpand Mini 128GB USB 3.0 Flash Drive Silver/Black

SKU CH-RXSR-T9WXQ

A USB 3.0 flash drive with 128GB capacity and read speeds up to 90MB/s for fast file transfers

  • Total capacity128 GB
  • 128 GB capacity stores large media libraries
  • USB 3.0 interface delivers up to 90 MB/s read speeds
  • iXpand Mini design frees space on iPhone and iPad
  • Compact silver-and-black housing fits on a keyring
  • SanDisk reliability backs everyday file transfers

128GB USB 3.0 Flash Drive

The SanDisk iXpand Mini offers 128GB of portable storage in a compact silver and black design. It connects via a standard USB 3.0 interface for broad compatibility with computers and other host devices. This drive suits users who need to move files between systems quickly and reliably.

USB 3.0 interface limits

Transfer speeds reach up to 90MB/s, which is the practical ceiling of the USB 3.0 connection used here. Performance will drop to USB 2.0 levels when plugged into older ports. The drive does not support faster USB 3.1 or 3.2 standards, so sustained throughput stays within this boundary.

Capless miniature build

The iXpand Mini uses a capless, low-profile housing that stays inserted in a laptop port without snagging. Its tiny footprint means it can remain attached during transport, reducing the chance of loss. The metal-and-plastic construction resists everyday wear, though the exposed connector lacks a protective cover when removed.

How it compares

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

Price $41.99
Pricier than about 60% of the 1,099 comparable items (median $31.99).
Total capacity 128 GB
Higher than about 60% of the 746 comparable items (median 64 GB).
Price per TB $328.05 per TB
Pricier than about 65% of the 600 comparable items (median $226.48 per TB).

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Specifications

Product
Brand nameSanDisk
Model nameSDIX40N-128G
Total capacity128 GB

Questions about this item

Which capacity should I choose — 16GB, 32GB, 64GB or 128GB?

The 128GB model holds roughly eight times more photos or documents than the 16GB option, so pick the size that matches the total amount of data you carry daily.

What does the 90MB/s read speed mean when I plug the drive into my laptop?

It indicates the maximum sequential read rate the drive can sustain on a USB 3.0 port; actual transfer times depend on file sizes, the host controller and any background activity.

The drive is labelled USB 3.0 — what performance ceiling does that standard impose?

USB 3.0 caps the theoretical bus bandwidth at 5Gb/s, so even though the drive can read at 90MB/s the port itself limits the absolute peak throughput.

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