SanDisk Ultra Dual USB Drive review: Android file transfers made easy

SanDisk Ultra Dual USB Drive

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At a Glance
  • SanDisk Ultra Dual USB Drive (32GB)

There are lots of ways to transfer files between your PC and an Android device, but the simplest method has been to tether one to your PC using a cable. SanDisk has a better idea: Its Ultra Dual USB Drive can be used with Android smartphones and tablets and with PCs. 

The thumb drive has a standard Type A USB 2.0 plug on one side, and a Micro-B USB 2.0 plug on the other. I tested the 32GB model with an HTC One smartphone. Both of the drive's connectors are protected by a sliding plastic shell that automatically retracts when you push the plug into a USB port (you’ll need to pull the covers back out when you unplug it). Due to the thickness of the thumb drive’s shroud, I had to pop the bottom of my phone out of its Speck case. But I’ve encountered the same issue with right-angled headphone plugs, so this isn’t a showstopper by any means.

SanDisk Ultra Dual USB Drive

The thick plastic cowl on the Dual USB Drive might force you to remove your smartphone or tablet from its case before you can plug it in. 

Having both connectors makes it extremely easy to transfer files between your Android smartphone or tablet and your PC. Move or copy files from your phone to the storage device, unplug it, plug it into your PC, and move or copy those files to that device (and vice versa). If you use a cloud-storage service, you can copy files there as well. The storage device measures just 1.5 inches long and 0.75 inches wide. It has a lanyard ring so you can add a tether, but the hole is extremely small.

The HTC One doesn’t have its own file-manager software, although there are a number of free Android apps available in the Google Play store. I’ve been using ES File Manager for a while, but I’ve since switched to SanDisk’s free Memory Zone, which has a much more polished user interface. Rather than having to drill down into the phone’s directory structure, Memory Zone indexes and sorts all the files it finds on the phone and on any storage device that’s plugged into it. You can add any cloud-storage services you use—such as Dropbox—and the app will index all the files stored there as well.

Once the files have been indexed, you can press the music icon to see a list of all the music files in storage. Press the landscape icon and you get a list of all the photos. There are also icons for movies, documents, and apps. Tap the file, and a Complete Action Using pop-up menu appears. If it’s a music or video file, you can play it with whatever media player apps are installed on the device. If it’s a photo, you can view it using your favorite photo editor, and so on.

SanDisk Ultra Dual USB Drive

SanDisk's free Memory Zone app is a very handy Android file manager—and it's free.

Press and hold a file name, and a pop-up menu will appear giving you the option to copy the file to another storage device or to your cloud account. You can also rename or delete the file, make the file private (these are password protected), or share the file on Facebook. Memory Zone also has a backup/restore function that you can set to automatically back up all or selected files from your phone to a USB storage device or—more practically—to your cloud-storage service.

This element of the app informs you of the backup’s progress, how fast files are being transferred, and an estimated time of completion. Backups can be performed over a 4G connection or limited to using Wi-Fi, so they don’t suck up your cellular data quota.

SanDisk’s Ultra Dual USB Drive would be a lot faster if it were outfitted with a USB 3.0 interface, but that would also make it more expensive. It’s already a bit pricey, with the 32GB model selling for $30. That’s a $10 premium over a conventional 32GB USB thumb drive, and you can buy a 10-foot micro USB cable for as little as a buck and a half. (SanDisk also offers 16GB Dual USB drives for $20, and 64GB drives for $50). But a cable isn’t nearly as convenient.

SanDisk isn’t the first company to hit on the idea of a two-headed storage device. Sony announced its own line of two-in-one drives last December. But Sony’s models top out at 32GB, and the company doesn’t offer an Android file manager.

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At a Glance
  • SanDisk’s Ultra Dual USB Drive is a bit pricey, but it’s a super convenient means of transferring files between Android smartphones and tablets and your computer.


    • Has both Type A and Micro-B USB plugs
    • Very small
    • Great file manager


    • Speed-limited USB 2.0 interface
    • Tiny lanyard hole
    • You might need to remove your phone's case
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