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

4.5 4.5 out of 5 stars 30,410 ratings

$9.44 with 27 percent savings
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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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Top Brand: SanDisk

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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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This Item
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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SanDisk MobileMate USB 3.0 Card Reader - microSD - USB 3.0 Type A
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Price-27% $9.44
List:$12.99
$4.99$6.99$7.79$6.99-14% $14.22
List:$16.48
Delivery
Get it as soon as Thursday, Sep 19
Get it as soon as Thursday, Sep 19
Get it as soon as Thursday, Sep 19
Get it as soon as Thursday, Sep 19
Get it as soon as Thursday, Sep 19
Get it as soon as Thursday, Sep 19
Customer Ratings
Sold By
Direct Suppliers US
WansursDirect
MepsiesDirect
Orlian Official Store
Dream Link - com
CWP Online
hardware interface
usb3.0
microsd
usb c, microsd
usb, usb c, usb1.1, microsd
usb c, micro sdxc
usb3.0
data transfer rate
0 megabits per second
480 megabits per second
50 gigabits per second
480 megabits per second
170 megabits per second
operating system
nintendo wii
Mac OS, Windows 11/10/8/7/XP, Linux, Android
MicroSD, MicroSDHC, MicroSDXC UHS-I Memory Card,
media type
UHS-1, microSD
SD Card, microSD
microSD, microSDHC, microSDXC
microSD
['microSD', 'SD Card', 'Memory Stick', 'CFexpress', 'CompactFlash', 'xD Picture Card']
UHS-1, microSD

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.
Product Warranty: For warranty information about this product, please click here

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


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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
    30,410 global ratings

    Customers say

    Customers like the size, ease of use, and speed of the memory card reader. They mention it's small, compact, and works well. Some say it comes in handy for quick OS installs and is not wildly labor intensive. However, some customers have issues with computer recognition. Opinions are mixed on functionality, quality, value for money, and memory readability.

    AI-generated from the text of customer reviews

    178 customers mention "Size"148 positive30 negative

    Customers like the size of the memory card reader. They mention it's small, compact, and works well. Some say it'll hold the card in perfectly.

    "This device is small and works perfectly. That's everything in a SD card reader. Would definately buy again." Read more

    "It is very very small, and it just works.Great device." Read more

    "...I like the compact size as well, less risk of accidentally bumping it...." Read more

    "...the reader which is disappointing because the small form factor was the best feature...." Read more

    140 customers mention "Ease of use"120 positive20 negative

    Customers find the memory card reader easy to use. They mention it's less complex, comes in handy for quick OS installs, and is not wildly labor intensive. Customers also say it'll be a simple drag-and-drop operation to move files to their laptop.

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

    "...Easy to use and works perfectly." Read more

    "This card reader has a unique GUID, which is needed for some niche registration applications like Unraid.The ergonomics are good...." Read more

    "Easy to use! Plenty of storage!" Read more

    130 customers mention "Speed"108 positive22 negative

    Customers like the speed of the memory card reader. They mention it plays video without buffering or pausing. The writer is sufficiently fast that the car doesn't complain. It definitely works with the advertised speeds and maintains around that speed fairly steadily. Customers also mention it saves time and avoids cableing to an additional unit.

    "...(speedy)..." Read more

    "...This adapter was very reasonable priced and the Reading speed plays video without buffering or pausing...." Read more

    "...This gets speeds that are just as fast without needing to worry if it will damage my computer, or my fingers. Great value in a tiny form factor" Read more

    "Quality and quick!" Read more

    699 customers mention "Functionality"342 positive357 negative

    Customers have mixed opinions about the functionality of the memory card reader. Some mention it works well, while others say it's not workable and makes every card look corrupted.

    "This device is small and works perfectly. That's everything in a SD card reader. Would definately buy again." Read more

    "...However, it does not appear to perform well in other use cases (unverified)...." Read more

    "This card reader is exactly what you want from a card reader: it does its job, performs well (speedy), never has issues swapping from Desktop to..." Read more

    "...consistently works OK with an old Kingston 1GB card but consistently DOES NOT work with set of new PNY Premier X U3/A1/V30 64GB cards and SanDisk..." Read more

    188 customers mention "Quality"58 positive130 negative

    Customers have mixed opinions about the quality of the memory card reader. Some mention it's built very well, is reliable, and a solid performer. Others say it'd be better if it was made of better materials.

    "Case Fell apart, can’t read sd micro chip..." Read more

    "...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 >>>>>>>>>>>>>>>>" Read more

    "...They don't stick out where they could get broken off and they are built very well. SanDisk does everything well." Read more

    "...Any higher will cause the SD card to overheat, and even cause corruption with the filesystem in some cases...." Read more

    99 customers mention "Memory readability"44 positive55 negative

    Customers have mixed opinions about the memory readability of the product. Some mention it works perfectly as an SD card reader, while others say it doesn't recognize the microSD card inserted.

    "...connected the slightest nudge or shake in the environment the sd card comes loose" Read more

    "works as an SD card reader. wouldn't call it the best, but it work's." Read more

    "...port, and while the icon for the drive appeared it acted like a microSD card wasn't inserted...." Read more

    "This is the best microSD reader out of 4 I have...." Read more

    98 customers mention "Value for money"52 positive46 negative

    Customers have mixed opinions about the value for money of the memory card reader. Some mention it performs exceptionally well for the price, while others say it's poorly made and not worth it.

    "...This adapter was very reasonable priced and the Reading speed plays video without buffering or pausing...." Read more

    "...Cheap plastic would be my guess. Ill be buying something a little better built. Sorely disappointed with what I thought a name brand should have been." Read more

    "...Great value in a tiny form factor" Read more

    "Genuinely the worst brand name product I've ever bought. Barely worked right out of the box...." Read more

    81 customers mention "Computer recognition"12 positive69 negative

    Customers are dissatisfied with the memory card reader's computer recognition. They mention it doesn't recognize the microSD card, and Windows 7 doesn't always recognize the device. Some say it loses recognition fairly easily if the card is nudged while inserted.

    "...one day after using it successfully to backup an SD card it won't even recognize the reader when plugged into the very same USB port on the PC...." Read more

    "Loose fitting, loses recognition fairly easily if the card is nudged while inserted...." Read more

    "...advertised speeds, but sometimes when I add the micro SD card it will not recognize it, I have to not push it all in, and just barely in for it to..." Read more

    "Computers do not recognize it, multiple computers and various micro sd cards, unusable. I ordered a replacement and it is the same way...." Read more

    Actually achieves advertised speeds of up to 170MB/s for UHS-1 cards!!
    5 out of 5 stars
    Actually achieves advertised speeds of up to 170MB/s for UHS-1 cards!!
    So excited this worked! I was worried it wasn't going to. Just make sure you're using a USB 3.0 port (usually will be blue on the inside). A little concerning, and I will update my review if it causes any issues, but the reader got quite warm during an only 13.4GB upload to my computer.Edit:After performing a much larger upload of 134GB, the performance did degrade as the card reader warmed up. However, it would return to ~170Mb/s after cooling down a bit.
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on September 1, 2024
    This device is small and works perfectly. That's everything in a SD card reader. Would definately buy again.
    Reviewed in the United States on July 1, 2024
    This card reader is exactly what you want from a card reader: it does its job, performs well (speedy), never has issues swapping from Desktop to Laptop, and you never have to worry about it not working. If you want a card reader that is easy to plug and play, I recommend using this card reader!

    My use case is transporting my .mov files from my camera to my desktop for editing. I have yet to run into a single issue, and everything uploads to my editing software and then to YouTube without a problem.
    3 people found this helpful
    Report
    Reviewed in the United States on August 15, 2024
    It is very very small, and it just works.

    Great device.
    Reviewed in the United States on April 23, 2019
    First off, it is very difficult to remove the microSD card from the reader if you have short nails. I would recommend putting a piece of (gaffer) tape on the card before inserting, to help with card removal.

    I am doing an informal test of this reader using a "SanDisk 128GB Extreme microSD UHS-I Card with Adapter - U3 A2 - SDSQXA1-128G-GN6MA" card.

    I compared this reader with a microSD to SD adapter in a "Lexar Professional USB 3.0 Dual-Slot Reader - LRW400CRBNA".

    Per H2testw, the Lexar combo achieved 88 MB/s read and 81 MB/s write, and the Sandisk reader achieved 152 MB/s read and 75 MB/s write. This is writing and reading 1.0 GB test files to the card.

    In Crystalmark, the Lexar combo achieved 94 MB/s sequential read and 83 MB/s sequential write, which Sandisk reader achieved 168 MB/s sequential read and 100 MB/s sequential write. If you look at the rest of the tests (random read/write), the Lexar combo is about 50% faster.

    Overall, for larger files, this reader is roughly 40% faster than using a microSD to SD adapter and regular SD card reader. To copy the contents of a 128GB card (that is advertised to work with it), that means cutting the time from 23 minutes to 13 minutes. However, it does not appear to perform well in other use cases (unverified).

    Another disadvantage: This USB reader does not fit in the same footprint as a SD card, so it does not store well in my memory wallet. Plus, it does not act as a 'backup' SD card.

    My intent was to bring this item on travels to quickly unload files, however I think I would rather purchase more memory cards and leave this reader at home.

    I am not sure if I would purchase this item again or would recommend it, however it does fit into my workflow of removing large files from the Sandisk microSD cards.
    Customer image
    4.0 out of 5 stars SanDisk MobileMate USB 3.0 microSD Card Reader - SDDR-B531-GN6NN
    Reviewed in the United States on April 23, 2019
    First off, it is very difficult to remove the microSD card from the reader if you have short nails. I would recommend putting a piece of (gaffer) tape on the card before inserting, to help with card removal.

    I am doing an informal test of this reader using a "SanDisk 128GB Extreme microSD UHS-I Card with Adapter - U3 A2 - SDSQXA1-128G-GN6MA" card.

    I compared this reader with a microSD to SD adapter in a "Lexar Professional USB 3.0 Dual-Slot Reader - LRW400CRBNA".

    Per H2testw, the Lexar combo achieved 88 MB/s read and 81 MB/s write, and the Sandisk reader achieved 152 MB/s read and 75 MB/s write. This is writing and reading 1.0 GB test files to the card.

    In Crystalmark, the Lexar combo achieved 94 MB/s sequential read and 83 MB/s sequential write, which Sandisk reader achieved 168 MB/s sequential read and 100 MB/s sequential write. If you look at the rest of the tests (random read/write), the Lexar combo is about 50% faster.

    Overall, for larger files, this reader is roughly 40% faster than using a microSD to SD adapter and regular SD card reader. To copy the contents of a 128GB card (that is advertised to work with it), that means cutting the time from 23 minutes to 13 minutes. However, it does not appear to perform well in other use cases (unverified).

    Another disadvantage: This USB reader does not fit in the same footprint as a SD card, so it does not store well in my memory wallet. Plus, it does not act as a 'backup' SD card.

    My intent was to bring this item on travels to quickly unload files, however I think I would rather purchase more memory cards and leave this reader at home.

    I am not sure if I would purchase this item again or would recommend it, however it does fit into my workflow of removing large files from the Sandisk microSD cards.
    Images in this review
    Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer image
    3 people found this helpful
    Report
    Reviewed in the United States on August 17, 2024
    I bought this to use the SanDisk Memory Card (see separate review of that terrific product) on my desktop computer. Easy to use and works perfectly.
    Reviewed in the United States on September 8, 2024
    This thing works beautiful especially with the SanDisk chip in it great job SanDisk and thanks Amazon
    Reviewed in the United States on August 24, 2024
    Makes life easier for data transfer without SD card slots. Does get a little hot however, so be mindful of that. Otherwise, great product to have.
    Reviewed in the United States on March 30, 2024
    This card reader is rarely recognized by the PC. I thought it was just a problem with plugging it into the hub on my monitor or another hub on my desktop, so I plugged it directly into my PC and it seemed to work. Now, one day after using it successfully to backup an SD card it won't even recognize the reader when plugged into the very same USB port on the PC. First it will pop up a Windows Explorer window making me think it worked, but before I can do anything with that Explorer window it disappears/closes. Then the next time I plug in the reader it pops open a blank window and says "Please insert a disk into Removable Disk (I:). Almost as if the Sandisk card reader can't see the Sandisk SD card. This is infuriating! $10 down the drain... after I successfully backed up one SD card I threw away the packing it came in, so no return possible. Thanks for nothing, Sandisk.

    ***

    A few hours later and I'm not sure it was all the fault of the card reader. Everytime I plugged it in with a Samsung SD card it worked, using the new Sandisk card I'd just purchased things got as described above. I decided that for some reason the card wasn't being fully seated when I pushed it into the slot, or that the card was a little on the thin side so it was moving inside the reader and losing contact. I slid a small piece of paper in with the card a voila, it worked. No more connection problems. So, the issue may lay with the Sandisk micro SD card, not the Sandisk reader.
    11 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    Juan Carlos Oñate
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on April 2, 2024
    Muy bien, tamaño excelente y muy a la vanguardia, hasta el momento ni una limitante...
    Patricia
    5.0 out of 5 stars Muy util
    Reviewed in Spain on August 21, 2024
    Si usas micro SD este lector es pequeño y funcional y esta marca nunca defrauda.
    Amazon Customer
    5.0 out of 5 stars Perfekt microSD-kortläsare
    Reviewed in Sweden on August 4, 2024
    Den här microSD-kortläsaren är perfekt. Liten, smidig och funkar utan problem.
    nazmi
    5.0 out of 5 stars boyutu küçük , kullanışlı
    Reviewed in Turkey on July 23, 2024
    boyutu küçük , kullanışlı
    Amazon Customer
    5.0 out of 5 stars Good price, useful
    Reviewed in the United Kingdom on July 3, 2024
    Good value connector used with an SD card to download photos and footage from a wildlife camera. Really handy, easy to use.