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SanDisk 256GB Ultra Dual Drive m3.0 for Android Devices and Computers - microUSB, USB 3.0 - SDDD3-256G-G46, Black

4.3 4.3 out of 5 stars 30,783 ratings

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256GB

Purchase options and add-ons

Brand SanDisk
Memory Storage Capacity 256 GB
Hardware Interface USB 3.0
Special Feature Compact
Read Speed 150 Megabytes Per Second

About this item

  • Free up space on your Android Phone (Requires device with micro-USB port and On-The-Go (OTG) support. See official SanDisk website for list of compatible devices.)
  • Back up photos, videos, and contacts. Compatibility-Windows 7, Windows 8, Windows 10, Mac OS X v10.9+ and higher
  • Retractable design with dual microUSB and USB 3.0 connectors
  • High-speed USB 3.0 performance with up to 150MB/s file transfer from drive to computer (Write speeds lower and varies by capacity. Micro-USB port with USB 3.2 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.)
  • SanDisk Memory Zone application (available on Google Play) lets you easily manage your photos and videos (Download and installation required. Set up automatic backup within app settings. See SanDisk Memory Zone website for details.)

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SanDisk 256GB Ultra Dual Drive m3.0 for Android Devices and Computers - microUSB, USB 3.0 - SDDD3-256G-G46, Black
SanDisk 256GB Ultra Dual Drive m3.0 for Android Devices and Computers - microUSB, USB 3.0 - SDDD3-256G-G46, Black
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Price$20.99-10% $17.99
List:$19.99
$11.99-20% $27.99
List:$34.99
$13.99$30.30
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Portability
4.6
5.0
4.5
4.4
4.7
Storage Capacity
4.5
5.0
4.6
4.1
4.7
Easy to use
4.2
5.0
4.4
3.9
4.2
Value for money
4.3
3.9
4.3
Sold By
Amazon.com
Amazon.com
WINSTONE
Amazon.com
Amazon.com
CWP Online
memory capacity
256 GB
128 GB
64 GB
256 GB
64 GB
256 GB
read speed
150 megabytes per second
130 megabytes per second
400 megabytes per second
200 megabytes per second
150 megabytes per second
hardware interface
usb3.0
usb
usb3.0
usb3.2 gen 1
usb3.2 gen 2
usb3.0

Product information

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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SanDisk

SanDisk 256GB Ultra Dual Drive m3.0 for Android Devices and Computers - microUSB, USB 3.0 - SDDD3-256G-G46, Black


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From the manufacturer

Hero 1
Hero 2

Dual Drive 3.0

Ultra Dual Drive m3.0

Dual Drive Luxe

Ultra Dual Drive Luxe

Dual Drive Go

Ultra Dual Drive Go

Dual Drive

Ultra Dual Drive

Customer Reviews
4.3 out of 5 stars
30,783
4.4 out of 5 stars
15,909
4.6 out of 5 stars
22,723
4.5 out of 5 stars
101,825
Connector
MicroUSB and USB Type-A USB Type-C and USB Type-A USB Type-C and USB Type-A USB Type-C and USB Type-A
Compatible Mobile Device
Android w/ Micro-USB port Android w/ USB Type-C port Android w/ USB Type-C port Android w/ USB Type-C port
Compatible Computer Device
PC/Mac with USB Type-A Port PC/Mac w/ USB-C or USB-A Ports PC/Mac w/ USB-C or USB-A Ports PC/Mac w/ USB-C or USB-A Ports
Design
Retractable All metal swivel design Swivel design Slider design
Keyring Hole
Yes Yes Yes No

(1) Requires device with On-the-Go (OTG) support. Visit our official site for the list of compatible devices.

(2) Download and installation required.

(3) Based on a 1.2GB MPEG-4 video transfer with USB 3.0 host device. Results may vary based on host device, file attributes and other factors.

(4) [32GB-256GB] Read speeds from drive to computer up to 150MB/s. [16GB] Read speeds from drive to computer up to 130MB/s. Write speeds lower and vary by drive capacity. USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device. 1MB = 1,000,000 bytes.

Western Digital Technologies, Inc. is the seller of record and licensee in the Americas of SanDisk products.

Product guides and documents

Product Description

The SanDisk Ultra Dual Drive m3.0 makes it easy to free up space on your OTG-enabled Android smartphone and tablet(1). With a micro-USB connector on one end and a USB 3.0 connector on the other, the drive lets you move content easily between all your devices—from your Android smartphone or tablet to your laptop, PC or Mac computer(1). The high-performance USB 3.0 connector is backward-compatible with USB 2.0 ports and, with speeds of up to 150MB/s*, it allows you transfer a full-length movie to the drive faster than with a standard USB 2.0 drive(3). This flash drive for your Android devices includes the SanDisk Memory Zone app for automatic camera roll backup and easy file and media management(2). | *(32GB-256GB) Read speeds from drive to computer up to 150MB/s. (16GB only) Read speeds from drive to computer up to 130MB/s. Write speeds lower and vary by drive capacity. USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. | **1GB=1,000,000,000 bytes. Actual user storage less. | (1) Requires device with On-The-Go (OTG) support. | (2) Download and installation required. | (3) Based on a 1.2GB MPEG-4 video transfer with USB 3.0 host device. Results may vary based on host device, file attributes and other factors.

What's in the box

  • Flash Drive, Manual
  • Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    30,783 global ratings

    Customers say

    Customers like the quality, ease of use, and capacity of the flash drive. For example, they mention it serves its purpose well, it's convenient, and it holds a ton of data. Some appreciate the value. That said, opinions are mixed on size, speed, and compatibility.

    AI-generated from the text of customer reviews

    957 customers mention681 positive276 negative

    Customers like the quality of the flash drive. They say it serves its purpose well, works fine, and is useful. Some mention that it's great to use without needing to link devices. Overall, customers are satisfied with the quality and functionality of the product.

    "Excellent product" Read more

    "...They take forever to copy. Once copied the device works well. These couple of things are going to cost it another star from my initial review." Read more

    "...Additionally, the loop for a keychain is abysmal. The plastic there is the most frail of all...." Read more

    "...pics from my android and laptop...just plug it in and transfer...great to use without needing to link devices via bluetooth too...i put what i want..." Read more

    369 customers mention285 positive84 negative

    Customers find the flash drive super convenient, easy to use, and fast. They say it makes moving large files faster and easier, and is handy for moving files from PC to phone, phone to PC, and TV. Customers also mention that it has great data transfer rates and can transfer photos and other files from their cell phone to this device.

    "...This is perfect for transferring data, school work, music & just about any other digital goods between them. I would definitely recommend this...." Read more

    "Small, easy to use and carry with you. Only fits older Android devices." Read more

    "...and Memory Zone app worked on my desktop because it makes moving large files faster and easier...." Read more

    "The only complaint I have is there are no instructions on how to use it. I had to search online for some kind of info." Read more

    202 customers mention181 positive21 negative

    Customers like the capacity of the flash drive. They say it has a large amount of storage space, has the storage of a standard hard drive, and holds a ton of data. Some say it's a good idea for phone storage, and a great drive to store all their photos. That said, some say it holds data well and is perfect for freeing up space on their cell phone.

    "This is a great device for significantly increasing the media storage available on an Android device that doesn't have it's own removable memory slot..." Read more

    "...to it or having cords to fool with...and again it frees up space on phone and computers ...i no longer buy a drive that doesnt have dual plugin..." Read more

    "...small so it can be easy to loose if you arent responsible but it has a lot of space and works fast too...." Read more

    "...The storage capacity is plenty for what I need, and it is big enough not to get lost but small enough not to take up space...." Read more

    146 customers mention123 positive23 negative

    Customers like the value of the flash drive. For example, they mention it's worth every penny, it'll speed up your data transfer, and it has a great storage capacity.

    "...This product works in all. Great for a very reasonable price." Read more

    "Great seller great item" Read more

    "...Price per GB is cheap.What's bad?:-- This drive is very slow. It is a USB 3.0 drive (USB 2.0 compatible)...." Read more

    "...Also, I feel it's pretty reasonably priced for a whopping 256 GB. Small and handy, works fast, no data cables needed...." Read more

    359 customers mention240 positive119 negative

    Customers are mixed about the size of the flash drive. Some mention that it's compact and easy to travel with, while others say that it can be easy to lose. Some customers also say that the device won't take larger sizes and is too bulky.

    "...This is useful on a long plane ride when you will probably need to plug a charger or external battery in at some point while still watching content...." Read more

    "...The size is convenient. I have had zero issues with compatibility with my Samsung Phone or several laptops, PC, Tablets...." Read more

    "...can get larger, about the 5 to 8 GB size, and this device won't take those larger sizes as I transfer them to my tablet to watch...." Read more

    "Small, easy to use and carry with you. Only fits older Android devices." Read more

    263 customers mention181 positive82 negative

    Customers are mixed about the speed of the flash drive. Some mention that it is quite fast and has the storage of a, while others say that it has super slow write speed and takes forever to copy.

    "...like any USB flash drive -- and if you have a USB 3.0 port the transfer is very fast...." Read more

    "...It made copying or moving files pretty easy...." Read more

    "...it reads: **Reads speeds from drive to computer up to 150MB/s. Write speeds lower and varies by capacity. USB 3.0 port required...." Read more

    "...The USB-C port is way faster than my older USB-A. How do they fit so much data on such a small device?" Read more

    69 customers mention25 positive44 negative

    Customers are mixed about the compatibility of the flash drive. Some mention that it's universally usable on all OS, and excellent for use with Nexus 5 phone. However, others say that the app and now my phone does not recognize the device.

    "...apparently doesn't work with that model of phone as the app couldn't detect the flash drive...." Read more

    "...The size is convenient. I have had zero issues with compatibility with my Samsung Phone or several laptops, PC, Tablets...." Read more

    "...Even though you can physically insert it into the port, not every device supports it. Many cheaper phones do not...." Read more

    "...other issues I have, and I may be a user error, it is not recognized by the Word mobile app as a save location...." Read more

    62 customers mention7 positive55 negative

    Customers are dissatisfied with the heat produced by the flash drive. They mention that it gets really hot in the process and the stick heats up after a couple hours use.

    "...drops are caused by thermal throttling of the drive, as it did it hot to the touch during testing...." Read more

    "...It heats up a bit when transfering a lot of data, as expected, but it honestly is not piping hot like ive experienced with others, even some bigger..." Read more

    "...I got the product the first time I plugged it into my phone it got really really hot and I started to think that there might be a problem but I..." Read more

    "...One thing to note is it does get pretty hot which is somewhat of a concern so we will see how well it holds up. The slider works without issue...." Read more

    Read the fine print, **130MB/s READ speeds, write speeds are lower
    5 Stars
    Read the fine print, **130MB/s READ speeds, write speeds are lower
    If you noticed the picture of the packaging, there are two asterisks aka a catch. On the back of the packaging it reads: **Reads speeds from drive to computer up to 150MB/s. Write speeds lower and varies by capacity. USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device.This isn't an issue for me as one cannot expect every device to perform as advertised. There will always be a limiting variable preventing you from ever reaching max advertised speeds. People need to understand this. Your old Galaxy S3 micro USB port (for example) will not push this drive to its limit. Onto the write/read speed test using H2testw.Using this drive on a USB 3.0 port and H2testw I was able to reach a peak of ~55MB/s write speeds at the start of the test. However that didn't last long and the drive steadily slowed down to 27.9MB/s 10min into the write test. At 1 hour, 25.7MB/s. When verifying the written data the drive peaked at 141MB/s. By the end of the test the drive stabilised at 103MB/s. I believe the drops are caused by thermal throttling of the drive, as it did it hot to the touch during testing.Please note, this isn't real world performance. H2testw is writing very large files, one at a time. Transferring photos will not reach these speeds as they are small files, the transfer speed will peak then drop back to zero before peaking at the next file. Transferring videos is similar to the test, as they are large files where the drive can ramp up to it's max possible speed. Again, depending on the host device and many other variables.H2testw is a free Windows utility that verifies the true capacity of the drive by writing "dummy files"; writing until the drive is full or "full". Then the utility reads them to verify the files, ideally the verify will complete without error. If it ends with an error it will show at what amount it ended. For example, if it ended at around 16GB but you purchased a 128GB; this simply means you received a counterfeit drive and should return the drive. If the test ended on an obscure number, the drive is faulty and needs replacing.The drive I received passed with a final capacity of ~117GB for the 128GB model. This is normal as some space is taken up by the MBR, the "library" of the drive where all your files locations are kept. This is how the host device knows what goes where, what is empty and what is not.There are two files already on the drive, a PDF manual and a APK file of SanDisks app for Android. I don't know why they bother including the APK as Android users would have to enable "Install from unknown sources" in their device settings. Just search for the app in the Play Store if enabling this makes your weary, although you can simply disable it right after you install the APK. But again, there's no point in the first place as the included app is probably outdated and will be updated by the Play Store soon after.
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