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Small black USB flash drive with retractable USB-A and micro-USB connectors

SanDisk

SanDisk SDDD3-256G-G46 Ultra Dual m3.0 256GB USB flash drive

SKU CH-QXMA-C2Y2A MPN SDDD3-256G-G46

Dual-connector flash drive with USB-A and micro-B ports stores 256GB and reads at up to 150MB/s for quick Android backups and PC transfers

  • Total capacity256 GB
  • USB standardUSB 3.0
  • USB port typesUSB-A Micro B
  • Max read speedup to 150 MB/s
  • Key featuresFree up space on your OTG-enabled Android phone Back up your
  • Product dimensions0.5 in × 1 in × 1.2 in

Capacity 256GB

  • Free up space on OTG Android phones with dual micro-USB and USB-A connectors
  • Back up photos, videos and contacts directly from your mobile device
  • Transfer files to a computer at up to 150MB/s via USB 3.0
  • Retractable design protects both connectors without a separate cap
  • Manage media easily using the SanDisk Memory Zone app from Google Play

Capacity and Compatibility

The SanDisk Ultra Dual Drive m3.0 provides 256GB of portable storage with both USB-A and micro-USB connectors. It is designed for users who need to move files between OTG-enabled Android phones and standard computers without cloud reliance.

Build and Connectors

A retractable mechanism protects the dual connectors when not in use, reducing the risk of bent pins inside bags or pockets. The micro-USB end plugs directly into compatible phones for on-the-go backup, while the USB 3.0 Type-A end delivers up to 150MB/s read speeds when connected to a PC.

Upgrade Context

This drive replaces the need for separate OTG adapters and conventional flash drives by combining both interfaces in one unit. The jump is worthwhile for anyone who regularly transfers photos, videos or contacts from an Android device lacking expandable storage and wants faster transfers than older USB 2.0 sticks can provide.

How it compares

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

Price $26.99
Cheaper than about 57% of the 1,099 comparable items (median $31.99).
Total capacity 256 GB
Higher than about 80% of the 746 comparable items (median 64 GB).
Price per TB $105.43 per TB
Cheaper than about 92% of the 600 comparable items (median $226.48 per TB).

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Specifications

Product
Brand nameSanDisk
Product lineUltra Dual m3.0
Model nameSDDD3-256G-G46
Total capacity256 GB
Performance
Max read speedup to 150 MB/s
Ports & slots
USB standardUSB 3.0
USB port typesUSB-A
Micro B
Size & build
Product dimensions0.5 in × 1 in × 1.2 in
Product weight0.01 lb (0 kg)
Shipping weight0.02 kg
Package size152 × 102 × 14 mm

Other versions of this model

1 more in the same range

Questions about this item

What read speed does the USB 3.0 interface cap at for this 256GB drive?

The USB 3.0 interface supports up to 150MB/s read speed when transferring files from the drive to a computer.

What physical space does the retractable dual-connector design need to fit?

It measures 0.50" x 1.00" x 1.20" and weighs 0.01 lb, so it fits in a pocket or bag alongside a phone.

How do I install the SanDisk Memory Zone app to back up photos and contacts?

Download the SanDisk Memory Zone app from Google Play, grant storage permissions, then select the files you want to back up to the drive.

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