SanDisk SDDDC3-128G Ultra Dual Drive Go USB-C 128GB Flash Drive — main product image

SanDisk SDDDC3-128G Ultra Dual Drive Go USB-C 128GB Flash Drive

SanDisk

SanDisk SDDDC3-128G Ultra Dual Drive Go USB-C 128GB Flash Drive

Name: SanDisk SDDDC3-128G Ultra Dual Drive Go USB-C 128GB Flash Drive
Brand: SanDisk
SKU: SDDDC3-128G-G46G

★★★★★4.6 (27950 reviews)

USB-CUSB 3.1USB 3.0

One flash drive, two connectors — swap files between USB-C and USB-A devices at up to 150MB/s with 128GB of storage.

$18.89*$24.99Save 24%

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The SanDisk Ultra Dual Drive Go SDDDC3-128G is a 2-in-1 flash drive engineered for the increasingly common scenario of moving files between USB-C and USB-A devices. One end features a reversible USB Type-C connector for modern smartphones, tablets, and laptops, while the other provides a traditional USB Type-A plug for older computers and peripherals. The swivel design keeps both connectors protected when not in use and includes a keyring hole for easy portability.

With 128GB of storage and USB 3.1 Gen 1 read speeds up to 150MB/s, the drive handles large photo libraries, video files, and document archives with ease. The companion SanDisk Memory Zone app for Android adds automatic photo backup functionality, turning the drive into a simple one-tap backup solution for your phone. Whether you need to free up space on a USB-C smartphone, transfer files to a desktop that only has USB-A ports, or simply carry a versatile drive that works with virtually any device, the Ultra Dual Drive Go covers all the bases in a single compact package.

Key Features

The 2-in-1 flash drive with a reversible USB Type-C and a traditional Type-A connector.

Seamlessly move content between your USB Type-C smartphone, tablets and Macs and USB Type-A computers(2); (2) Mobile device requires USB Type-C port and On-The-Go (OTG) support. See the official SanDisk website for a list of compatible devices.

Free up space on your USB Type-C smartphone(2)

Automatically back up photos with SanDisk Memory Zone app(3); (3) Download and installation of SanDisk Memory Zone app required.

High-performance USB 3.1 Gen 1 drive with 150MB/s read speeds(1); (1) Read speeds up to 150MB/s. Write speed lower and vary by capacity. USB Type-C port with USB 3.1 Gen 1/ USB 3.0 support required. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB = 1,000,000 bytes.

Specifications

Brand

SanDisk

Model

SDDDC3-128G-G46G

Capacity

128GB

Connectors

USB Type-C and USB Type-A

USB Standard

USB 3.1 Gen 1

Read Speed

Up to 150MB/s

Design

Dual-purpose swivel with keyring hole

Companion Software

SanDisk Memory Zone app (Android)

Pros & Cons

👍 Pros

Dual USB-C and USB-A connectors eliminate the need to carry separate drives or adapters.
Compact swivel design with a keyring hole makes it easy to carry on a keychain.
150MB/s read speed moves large files quickly between devices.
128GB capacity provides ample space for photos, documents, and media backups.

👎 Cons

Write speeds are significantly slower than read speeds and are not specified by SanDisk.
The small form factor makes it easy to misplace if not attached to a keyring.
No built-in encryption or hardware password protection on the standard model.
The swivel mechanism could wear over time with heavy daily use.

Frequently Asked Questions

Does the SanDisk Ultra Dual Drive Go work with smartphones?

Yes, it works with USB Type-C smartphones that support USB On-The-Go (OTG). You can check the SanDisk website for a list of compatible devices.

What read and write speeds can I expect from this 128GB drive?

Read speeds reach up to 150MB/s via USB 3.1 Gen 1. Write speeds are lower and vary by capacity and host device conditions.

Can I switch between USB-C and USB-A without any adapters?

Yes, the drive has a built-in swivel design with both a USB Type-C and a USB Type-A connector — no adapters or dongles needed.

What is the SanDisk Memory Zone app?

It is a free companion app for Android that lets you automatically back up photos and manage files on the flash drive. It requires a separate download and installation.