| Brand | SanDisk |
|---|---|
| Item model number | SDDR-B531-GN6NN |
| Operating System | nintendo wii |
| Item Weight | 0.064 ounces |
| Product Dimensions | 1.2 x 0.82 x 0.35 inches |
| Item Dimensions LxWxH | 1.2 x 0.82 x 0.35 inches |
| Color | Black |
| Manufacturer | Western Digital Technologies Inc. |
| ASIN | B07G5JV2B5 |
| Is Discontinued By Manufacturer | No |
| Date First Available | August 4, 2018 |
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$9.44$9.44
Ships from: Amazon Sold by: Direct Suppliers US
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$7.99$7.99
Ships from: Amazon Sold by: MemoryWhiz
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SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN
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Return this item for free
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Learn more
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
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
Frequently bought together

Top rated similar items
SanDisk 128GB Ultra microSDXC UHS-I Class 10 Memory Card 100 MB/s SDSQUNR-128G-GN6MNAmazon's Choicein Micro SD Memory Cards
Top Brand: SanDisk
From the manufacturer
SanDisk Extreme 128GB | 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 |
Compare with similar items
This Item ![]() SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
| Price | -27% $9.44$9.44 List: $12.99 | $4.99$4.99 | $6.99$6.99 | $7.79$7.79 | $6.99$6.99 | -14% $14.22$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 |
Videos
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1:11
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Not a flush fit, wobbles and difficult to remove card
R. Matthew

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1:16
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Customer Review: Does NOT Work with Samsung Micro SD
The Next Big Thing

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0:37
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SanDisk MobileMate USB 3.0 microSD Card Reader Review
GA Reviews

Product information
Technical Details
Additional Information
| Customer Reviews |
4.5 out of 5 stars |
|---|---|
| Best Sellers Rank | #33 in Computer Memory Card Readers |
Warranty & Support
Feedback
Looking for specific info?
What's in the box
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
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers 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
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
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
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
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
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
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
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
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
Reviews with images
Actually achieves advertised speeds of up to 170MB/s for UHS-1 cards!!
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Top reviews
Top reviews from the United States
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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.
Great device.
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.
Reviewed in the United States on April 23, 2019
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.
***
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.

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