RAM | 16 GB |
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Memory Speed | 170 MB |
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SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN
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- Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
- Learn more about free returns.
- Go to your orders and start the return
- Select the return method
- Ship it!
Enhance your purchase
Brand | SanDisk |
Hardware Interface | USB 3.0 |
Color | Black |
Compatible Devices | Camera |
Item Dimensions LxWxH | 1.2 x 0.82 x 0.35 inches |
About this item
- Make sure this fits by entering your model number.
- 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
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![]() This item SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN | ![]() Kingston MobileLite Plus USB 3.2 microSDHC/SDXC UHS-II Card Reader (MLPM) | ![]() SanDisk SD UHS-I Card Reader - SDDR-C531-GNANN | ![]() Vanja Micro USB OTG Adapter and USB 2.0 Portable Memory Card Reader for SD-3C SDXC SDHC MMC RS-MMC Micro SDXC Micro SD Micro SDHC Card and UHS-I Cards | ![]() Kingston MobileLite Plus USB 3.2 SDHC/SDXC UHS-II Card Reader (MLP) | |
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Customer Rating | 4.8 out of 5 stars (348987) | 4.6 out of 5 stars (1052) | 4.6 out of 5 stars (4029) | 4.5 out of 5 stars (50597) | 4.5 out of 5 stars (787) |
Price | $12.40$12.40 | $9.99$9.99 | $16.62$16.62 | $6.39$6.39 | $9.99$9.99 |
Shipping | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime |
Sold By | MemoryWhiz | Amazon.com | Direct Suppliers US | Vanja Direct | Amazon.com |
Are batteries required? | No | No | No | No | No |
Color | Black | Black | Black | black | Black |
Computer Memory Size | 16 GB | — | — | — | — |
Digital Storage Capacity | 16 TB | 0 GB | — | 64.0 GB | 0 GB |
Item Dimensions | 1.2 x 0.82 x 0.35 inches | 1.44 x 0.79 x 0.29 inches | 1.25 x 2.48 x 0.32 inches | 1.89 x 0.27 x 0.57 inches | 2.04 x 1.32 x 0.35 inches |
Memory Storage Capacity | 1 GB | 1 MB | 0 GB | — | 1 MB |
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.
Product information
Technical Details
Brand | SanDisk |
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Item model number | SDDR-B531-GN6NN |
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 10, 2018 |
Additional Information
Customer Reviews |
4.8 out of 5 stars |
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Best Sellers Rank | #12 in Computer Memory Card Readers |
Warranty & Support
Feedback
What's in the box
From the manufacturer




![]() SanDisk Extreme 128GB | ![]() MobileMate USB 3.0 Reader | ![]() 128GB Card & Reader Bundle |
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Video QualityCapture uninterrupted 4K UHD and Full HD video without skipping frames | Move Files Fast10X faster than with USB 2.0 readers⁸ with the performance of USB 3.0 | Capture Hi-res video FastCapture uninterrupted 4K UHD video anytime anywhere |
Read SpeedUp to 160MB/s* means shorter wait times when transferring files | Read SpeedUp to 160MB/s⁹ so you can move big files (or a lot of files) fast | Read SpeedUp to 160MB/s⁹ so you can move files fast |
Write SpeedUp to 90MB/s* enables you to capture fast action in full detail | Compact & DurableTake it anywhere—built to hold its own when tossed in your bag | |
Performance RatingRecord and shoot faster with C10, U3, and V30, and load apps faster with A2 | USB 3.0-CompatibleThe reader is compatible with USB 3.0 and backwards-compatible with USB 2.0 |

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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.
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Reviewed in the United States on March 3, 2019
Top reviews from the United States
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If this card is somehow "fake" it is quite impressive. I'm sure there are some fakes out there, but if you do decide to buy this card it might be worth performing your own tests before deeming it fake based off the looks alone (assuming it's not an incredibly obvious fake).
April 18, 2020 (13 month update): card still works great. No complaints, I'm very happy with it.

By Mike on March 2, 2019
If this card is somehow "fake" it is quite impressive. I'm sure there are some fakes out there, but if you do decide to buy this card it might be worth performing your own tests before deeming it fake based off the looks alone (assuming it's not an incredibly obvious fake).
April 18, 2020 (13 month update): card still works great. No complaints, I'm very happy with it.





Am glad I did I finally have ALL my games on my system, no more having to delete a few here and there to make room for the next game, finally I can just sit back and Buy/Download just about anything I can get, worry free of weather or not I have enough space!!!!
After the format I believe I was left with around 953GB and as of now am left with 75.8GB TOTAL left (Including System Memory), which is still very good at least to me since most games are 2 to 8 sometimes 12GB depending on the game.
Anyway I have a total of 176 Games the range from huge AAA games to small Nindies (Nintendo Indies) games as well, and again am very happy with my purchase. Also you can see my current inventory of games in the pictures for better idea of what games

By The Dukes Brew on January 8, 2020
Am glad I did I finally have ALL my games on my system, no more having to delete a few here and there to make room for the next game, finally I can just sit back and Buy/Download just about anything I can get, worry free of weather or not I have enough space!!!!
After the format I believe I was left with around 953GB and as of now am left with 75.8GB TOTAL left (Including System Memory), which is still very good at least to me since most games are 2 to 8 sometimes 12GB depending on the game.
Anyway I have a total of 176 Games the range from huge AAA games to small Nindies (Nintendo Indies) games as well, and again am very happy with my purchase. Also you can see my current inventory of games in the pictures for better idea of what games

















Second red flag was the MUCH lower than advertised read/write speeds (only 50-55 write with mid 80s read).
Third red flag was when I tried to copy data from my old sd card on to this one. I was able to get about 21.5 GB of data on to it until it unmounted itself from my computer. I then physically removed the card and inserted it back in the computer. Windows recommended that I repair the drive, so I did. After that, I go and try to copy the data again and it unmounted itself, just like before. I tried the same thing by repairing the drive, except this time, Windows informs me that it could not be repaired! Seriously??
So much for trying to get a good black Friday deal...
Now my phone has more storage space than my two best laptops... of course you know, I will buy more.
This, so far, is the holy grail for portable storage... this has more memory than the SSD in my ThinkPad W530 workstation... blows my mind. As far as quality goes, you can't beat SanDisk, they been around since the beginning in the SD card arena.
This little tiny thing, is so tiny, I could put it up my rear end, after filling it with days worth of videos and unending images... doubt I will never need this much room but... I like to record a lot. This thing pretty much turned my lowly cell phone into an absolute powerhouse.
This is not the fault of anyone, just wanted to help people become more aware of it.
Besides that, the packaging was really nice and well done. The card achieves its rated speeds after testing it using my computer. If you are looking at this for an expensive camera capable of utilizing it properly, look no further.