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Small black USB-A microSD card reader, compact rectangular shape

SanDisk

SanDisk SDDR-B531-AN6NN USB 3.0 Card Reader

SKU CH-87TH-TPP22 MPN SDDR-B531-AN6NN

A compact USB 3.0 microSD reader transfers files at up to 170MB/s with no software required

  • Interface typeUSB 3.0, USB-A
  • Product typeFlash Reader
  • Product dimensions0.34 in × 0.81 in × 1.2 in
  • Key featuresTransfer speeds of up to 170 MB/s Move big files fast, move
  • Transfer up to 170 MB/s with USB 3.0 interface
  • Move files up to 10x faster than USB 2.0 readers
  • Compact design measures .34 x .81 x 1.20 inches
  • Works with microSD cards from cameras and drones
  • No software or downloads required for operation

SanDisk MobileMate USB 3.0 Reader

The SanDisk MobileMate SDDR-B531-AN6NN is a compact USB 3.0 card reader designed for microSD cards. It connects via a standard USB-A port and requires no drivers or extra software. Transfer speeds reach up to 170MB/s, moving large files quickly.

Photographers and drone pilots with microSD media

This reader suits anyone needing fast, driver-free offloads from microSD cards used in cameras or drones. It is not for users who need to read full-size SD, CFexpress, or other card formats, nor for those requiring multiple simultaneous card slots.

Driver-free operation and broad compatibility

The device works immediately on any host with a USB-A port, supporting USB 3.0 and falling back to USB 2.0. No bundled utilities or firmware tools are included, so workflow stays limited to simple drag-and-drop transfers.

How it compares

Measured against everything we stock in USB & Internal Card Readers, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 76% of the 511 comparable items (median $18.99).

Specifications

Product
Brand nameSanDisk
Model nameSDDR-B531-AN6NN
Product typeFlash Reader
Ports & slots
Interface typeUSB 3.0, USB-A
Size & build
Product dimensions0.34 in × 0.81 in × 1.2 in
Shipping weight0.08 kg
Package size109 × 69 × 28 mm

Questions about this item

What type of USB port does my computer need to use the SDDR-B531-AN6NN reader?

The reader plugs into a standard USB-A port and works with USB 3.0 or USB 2.0 connections.

Will this reader still work if I connect it to an older USB 2.0 port?

Yes, it is backwards-compatible with USB 2.0, though transfer speeds will be limited to that standard.

How can I confirm the reader is performing at its rated speed after setup?

Transfer a large file to your computer and verify the sustained rate approaches 170MB/s with a compatible microSD card.

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