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SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN

4.5 4.5 out of 5 stars 31,089 ratings

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Purchase options and add-ons

Brand SanDisk
Media Type microSD, UHS-1
Connectivity Technology USB Type A
Special Feature Compact
Color Black

About this item

  • Compact and durable microSD card reader
  • Fast UHS-I transfer speeds of up to 170 MB/s*
  • With USB 3.0, move content up to 10x faster than USB 2.0 readers(2)
  • Compatible with USB 3.0 and backwards-compatible with USB 2.0
  • Two-year limited manufacturer warranty(1)
  • Dimensions (L x W x H) - 30.48mm x 20.701mm x 8.763mm

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SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN
SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN
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Price-28% $9.40
List:$12.99
$4.99$4.99$17.10$9.88$12.88
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From the manufacturer

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

SanDisk Extreme 128GB

MobileMate USB 3.0 Reader

MobileMate USB 3.0 Reader

128GB Card & Reader Bundle

Video Quality

Capture uninterrupted 4K UHD and Full HD video without skipping frames

Move Files Fast

10X faster than with USB 2.0 readers⁸ with the performance of USB 3.0

Capture Hi-res video Fast

Capture uninterrupted 4K UHD video anytime anywhere

Read Speed

Up to 160MB/s* means shorter wait times when transferring files

Read Speed

Up to 160MB/s⁹ so you can move big files (or a lot of files) fast

Read Speed

Up to 160MB/s⁹ so you can move files fast

Write Speed

Up to 90MB/s* enables you to capture fast action in full detail

Compact & Durable

Take it anywhere—built to hold its own when tossed in your bag

Performance Rating

Record and shoot faster with C10, U3, and V30, and load apps faster with A2

USB 3.0-Compatible

The reader is compatible with USB 3.0 and backwards-compatible with USB 2.0

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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.

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What's in the box

  • MobileMate USB 3.0 Reader
  • Product Description

    The MobileMate USB 3.0 microSD card reader is the easy way to quickly transfer content from your camera or drone’s memory card. This compact and durable reader requires no downloads or software and is compatible with USB 3.0 and backwards-compatible with USB 2.0. And, with transfer speeds of up to 170MB/s, you can move what needs moving and then get going again. | Up to 170MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, require compatible devices capable of reaching such speeds. | (1) See SanDisk website for additional information and limitations. | (2) Transfer to drive up to 10 times faster than standard USB 2.0 drives (4MB/s); USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device.

    Customer reviews

    4.5 out of 5 stars
    31,089 global ratings

    Review this product

    Share your thoughts with other customers

    Customers say

    Customers appreciate the compact size and fast speed of the memory card reader. They find it easy to use and compatible with USB-C devices. However, some have mixed opinions on its functionality, readability, quality, and value for money.

    AI-generated from the text of customer reviews

    204 customers mention "Size"156 positive48 negative

    Customers like the compact size of the memory card reader. They say it's a small form factor microSD card reader that fits right in and configured instantly. The card slips in easily, just a push against the spring loaded release, and it holds the card in perfectly.

    "...Despite its small size, it feels solid and durable, so I don’t have to worry about it breaking easily...." Read more

    "...Plus, the compact size makes it easy to carry around in my bag, ensuring I always have it on hand for any data transfer needs...." Read more

    "Works well and small enough to put in your pocket. Use it with Roku Ultra to view Gopro footage on the TV" Read more

    "The adapter works great, but it is so small I lose it all the time and spend sometimes an hour looking for it, also my cat thinks it is his new toss..." Read more

    165 customers mention "Speed"137 positive28 negative

    Customers appreciate the memory card reader's speed. They mention it reads and writes to memory cards faster than before, with a fast response when listening to music. The reading speed plays videos without buffering or pausing. It maintains around that speed fairly steadily, delivering maximum performance of their Micro SD cards. Some customers also mention it can support SanDisk 160MB/s transfer speeds.

    "...My files transfer quickly without any lag, saving me precious time during busy workdays or while editing my latest photography project...." Read more

    "Perfect reader that delivers maximum performance of your Micro SD." Read more

    "...It worked very fast but should it have run that hot?" Read more

    "...I get average 90MB/s write speed, and it maintains around that speed fairly steadily...." Read more

    144 customers mention "Ease of use"127 positive17 negative

    Customers find the memory card reader easy to use and handy for quick OS installs. It's small and unobtrusive, working great right out of the box. Formatting is straightforward and easy to do. The reader functions as expected, being quickly recognized by both Linux and Windows. Moving cards to their laptop is a simple drag-and-drop operation, saving them precious time during busy workdays or while editing their latest projects.

    "...My files transfer quickly without any lag, saving me precious time during busy workdays or while editing my latest photography project...." Read more

    "...If you want a card reader that is easy to plug and play, I recommend using this card reader!..." Read more

    "...Its compact size makes it easy to live with, and the speed? My goodness, the speed!..." Read more

    "...The ergonomics are good. Easy to grasp with your fingers and pull out of USB ports...." Read more

    86 customers mention "Usb compatibility"66 positive20 negative

    Customers appreciate the memory card reader's USB compatibility. It plugs directly into a computer's USB slot and is USB-C compatible with backward compatibility with USB 2. They can read and write to the cards, use them as USB drives, and have no issues using genuine SD cards. The reader has a unique USB GUID, so you can use a genuine one. The SD cards seat firmly and there are no clearance issues with any USB ports that they plugged them into. Overall, customers find it reliable and the most convenient microSD USB reader they've ever owned.

    "...Despite its small size, it feels solid and durable, so I don’t have to worry about it breaking easily...." Read more

    "This USB adapter works great. My PC recognized the micro SD card, and I was able to format the card and do everything else I wanted...." Read more

    "...And because this reader is USB-C compatible, I can read and write to memory cards faster than before...." Read more

    "...and it seems to work fine, but the sides flare out and it can NOT be placed into a USB with another USB right next to it... the sides stick out too..." Read more

    677 customers mention "Functionality"418 positive259 negative

    Customers have mixed opinions about the memory card reader's functionality. Some say it works well and is a great workaround for old, low-power USB devices. Others report issues like it not working properly, not detecting cards on various systems, and only working in a 3.0 USB slot.

    "...Plus, it works seamlessly with both Windows and Mac systems." Read more

    "...the Manufacture, sealed packaging -- I felt good about that, but it did not work -- oh, wait, it worked for about 30 seconds then just quit...." Read more

    "It works, no complaints." Read more

    "It works for the most part, I kind of have to press the microSD into it a bit hard to get it to read. Other than that, it works as intended." Read more

    236 customers mention "Memory card readability"103 positive133 negative

    Customers have different experiences with the memory card reader. Some say it reads micro SD cards as advertised, while others report issues where the cards don't read when inserted.

    "...More than 170F! Guess what? The card reader throttled...." Read more

    "...The dual-slot feature is fantastic, allowing me to use both SD and microSD cards simultaneously, which is perfect for multitasking...." Read more

    "...Initially, the cards would not read or be recognized by my laptop- but I jiggled them around a little and it finally worked...." Read more

    "Perfect reader that delivers maximum performance of your Micro SD." Read more

    207 customers mention "Quality"103 positive104 negative

    Customers have mixed opinions about the memory card reader's quality. Some find it reliable and well-built, describing it as a solid performer. Others mention it feels flimsy and needs some work on reliability.

    "...Despite its small size, it feels solid and durable, so I don’t have to worry about it breaking easily...." Read more

    "...However, the reader can sometimes feel a bit flimsy, especially when inserting and removing the cards repeatedly, but it hasn’t caused any issues so..." Read more

    "...I've been using this daily for the past couple weeks, and it's been reliable. Recommended." Read more

    "...problems with this reader, I suspect the reason was due to low quality memory cards...." Read more

    135 customers mention "Value for money"57 positive78 negative

    Customers have different views on the value for money of the memory card reader. Some find it decent for the price, affordable, and performing well. Others say it's poorly made and not worth their time or money.

    "...of a tiny drive is portability, but because of the way they use cheap pins that stick out they move too easily when a card is inserted or removed...." Read more

    "...drive and y-cable to use 2x USB ports, I was able to use this affordable adapter so that a repurposed Sandisk micro SD card could be read as USB..." Read more

    "...Piece of junk." Read more

    "...It's cheap. It's small, smaller than thumb drive. Everything seems perfect, right? No no no 1...." Read more

    Perfect for Unraid, and of course for use as a card reader
    5 out of 5 stars
    Perfect for Unraid, and of course for use as a card reader
    I had 2 generic SD/MicroSD card readers and wanted to try out Unraid OS with them and they both failed to install Unraid on because of lack of GUIDs. I even tried 2 USB Sticks, one was a 128GB SanDisk stick and that one also did not have a GUID that's needed for an Unraid install.I read this was being used by some others for Unraid and thought to try it. And of course, it worked like a charm. I was abl to insert a 64GB MicroSD card in it and am running a test version of the OS on it. Let's hope it lasts a couple of years and more.
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    Top reviews from the United States

    • Reviewed in the United States on November 15, 2024
      It’s incredibly compact and portable, making it easy to carry around without sacrificing performance. Despite its small size, it feels solid and durable, so I don’t have to worry about it breaking easily. Plus, it works seamlessly with both Windows and Mac systems.
    • Reviewed in the United States on December 5, 2024
      It works, no complaints.
    • Reviewed in the United States on October 23, 2024
      I love how easy it is to use—just plug it into my laptop or desktop and insert the microSD card, and voila! My files transfer quickly without any lag, saving me precious time during busy workdays or while editing my latest photography project. The durable design ensures it withstands frequent use, making it a reliable tool in my tech arsenal.

      The dual-slot feature is fantastic, allowing me to use both SD and microSD cards simultaneously, which is perfect for multitasking. Plus, the compact size makes it easy to carry around in my bag, ensuring I always have it on hand for any data transfer needs.

      However, the reader can sometimes feel a bit flimsy, especially when inserting and removing the cards repeatedly, but it hasn’t caused any issues so far. Additionally, while it’s compatible with a wide range of devices, ensuring a proper connection might require a quick restart on some older systems.

      Overall, the SanDisk MobileMate USB 3.0 microSD Card Reader is a must-have for anyone dealing with microSD cards regularly. It’s fast, reliable, and incredibly convenient, making data transfers seamless and efficient. A solid 5-star rating for its speed and versatility, with a tiny star lost to its occasional flimsiness.
      One person found this helpful
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    • Reviewed in the United States on January 1, 2025
      It works for the most part, I kind of have to press the microSD into it a bit hard to get it to read. Other than that, it works as intended.
    • Reviewed in the United States on January 4, 2025
      01.04.2025 - Pay a bit more, get quality product. Unlike other USB/Micro SD adapters (MicroSd card inserts into the USB portion) that get hot to the touch & fail after a dozen or so uses, the SanDisk remains cool. How long it will last is questionable. When and if it fails, I will update this post.
    • Reviewed in the United States on November 13, 2024
      I had 2 generic SD/MicroSD card readers and wanted to try out Unraid OS with them and they both failed to install Unraid on because of lack of GUIDs. I even tried 2 USB Sticks, one was a 128GB SanDisk stick and that one also did not have a GUID that's needed for an Unraid install.
      I read this was being used by some others for Unraid and thought to try it. And of course, it worked like a charm. I was abl to insert a 64GB MicroSD card in it and am running a test version of the OS on it. Let's hope it lasts a couple of years and more.
      Customer image
      Bob
      5.0 out of 5 stars
      Perfect for Unraid, and of course for use as a card reader

      Reviewed in the United States on November 13, 2024
      I had 2 generic SD/MicroSD card readers and wanted to try out Unraid OS with them and they both failed to install Unraid on because of lack of GUIDs. I even tried 2 USB Sticks, one was a 128GB SanDisk stick and that one also did not have a GUID that's needed for an Unraid install.
      I read this was being used by some others for Unraid and thought to try it. And of course, it worked like a charm. I was abl to insert a 64GB MicroSD card in it and am running a test version of the OS on it. Let's hope it lasts a couple of years and more.
      Images in this review
      Customer imageCustomer imageCustomer image
      2 people found this helpful
      Report
    • Reviewed in the United States on January 11, 2025
      See Headline
    • Reviewed in the United States on March 17, 2023
      03/24/2023 Update -- I plugged and unplugged several times, in a different laptop -- a new model Lenovo Flex and it worked. I was able to upload 20GB of files and to retrieve them as well. Why it is working in the new model laptop? I have not idea, but I will be keeping it for the simple reason that I had planned on using for a temporary backup and would not be removing the device once installed. It may be that the thin connections, from device to device may have need to be scrubbed (old school), to help make a clean connection. That is what is seems to be - by multiple removal and insertions, maybe, the same result. Of course, this does not lead to much confidence. If it was not for a clean manufacture packaging and being a Brand name, I would have tossed it.

      Unbelievable -- I did not work. Came in the Manufacture, sealed packaging -- I felt good about that, but it did not work -- oh, wait, it worked for about 30 seconds then just quit. I tired a known working 128GB card with files on it and go 0 readings. I wiggled and reinserted and reinserted -- but the final conclusion was -- It does not work. I have used and still use Sandisk micro cards for years without one fault or failure, and had great confidence in this small flash drive. Very disappointed. It was a Sandisk, 128GB micro Extreme sd card that I used, and I reinserted it back into another sd card reader and it was perfect. I know, a few others said the same thing, but others said they have a good one -- really disappointed.

      Update: 05/23/2023 -- Nope, still a piece of junk. Not even time brings this back to life. Done with it, to the trash, to the trash >>>>>>>>>>>>>>>>
      17 people found this helpful
      Report

    Top reviews from other countries

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    • José
      5.0 out of 5 stars Muy estable
      Reviewed in Mexico on August 15, 2023
      Es un buen dispositivo, muy confiable, no he tenido problemas de lectura / escritura con él, en comparación de otros lectores de tarjeta mas económicos, pero no fiables, puedo leer tarjetas que no puedo leer con otros lectores
    • Patrick Rouchet
      5.0 out of 5 stars efficace et peu encombrant
      Reviewed in Belgium on January 27, 2025
      fonctionne parfaitement, et peu encombrant quand on utilise cet appareil sur un ordinateur portable que l'on déplace régulièrement !
    • Fernando
      5.0 out of 5 stars Lector de tarjetas compacto y cómodo
      Reviewed in Spain on January 9, 2025
      Es el primer lector de tarjetas que utilizo y la verdad funciona muy bien. Algo a destacar es que es muy compacto y no ocupa mucho espacio. Es para tarjetas MICRO SD. Uso normalmente tarjetas micro SD SanDisk y este adaptador funciona 100%. Recomendado.
      Customer image
      Fernando
      5.0 out of 5 stars
      Lector de tarjetas compacto y cómodo

      Reviewed in Spain on January 9, 2025
      Es el primer lector de tarjetas que utilizo y la verdad funciona muy bien. Algo a destacar es que es muy compacto y no ocupa mucho espacio. Es para tarjetas MICRO SD. Uso normalmente tarjetas micro SD SanDisk y este adaptador funciona 100%. Recomendado.
      Images in this review
      Customer imageCustomer imageCustomer imageCustomer image
    • Pedro Jr
      5.0 out of 5 stars Worth the money
      Reviewed in the United Arab Emirates on January 4, 2025
      Recommended
    • Elisa
      5.0 out of 5 stars Molto buona
      Reviewed in Italy on December 23, 2024
      Piccolo ed efficente