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SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN6MA

4.8 out of 5 stars 28,088 ratings
$59.99
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Purchase options and add-ons

Brand Sandisk
Model Name SDSQUAR-400G-GN6MA
Flash Memory Type Micro SDXC
Memory Storage Capacity 400 GB
Compatible Devices Tablet, Camera, Smartphone

About this item

  • Ideal for Android smartphones and tablets, and MIL cameras
  • Capacities up to 512GB (1GB=1,000,000,000 bytes. Actual user storage less.) to store even more hours of Full HD video (Approximations; results and Full HD (1920x1080) video support may vary based on host device, file attributes and other factors.)
  • Up to 100MB/s transfer read speed (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors.) lets you move up to 1000 photos in a minute (Based on 4.1GB transfer of photos (Avg file 3.5MB) with USB 3.0 reader. Results may vary based on host device, file attributes and other factors.)
  • Load apps faster with A1-rated performance (A1 performances is 1500 read IOPS, 500 write IOPS. Based on internal testing. Results may vary based on host device, app type and other factors.)
  • Class 10 for Full HD video recording and playback (Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors.)
  • SanDisk Memory Zone app for easy file management (Download and Installation Required)
  • Order with your Alexa enabled device. Just ask "Alexa, order SanDisk microSD."
› See more product details
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Competitively priced item

Amazon's Choice
4.7 out of 5 stars (112235)
$17.99

Frequently bought together

SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN
This item: SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN6MA
$59.99
Get it as soon as Sunday, May 18
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Sold by 212 Distributors (blue light serial #'s recorded) and ships from Amazon Fulfillment.
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Top Brand: SanDisk

Highly Rated
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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.
m4_Desktop
SanDisk Ultra

Need more speed?

Android phone/tablet

Devices

Phone, ActCam, Drone

Full HD

Video Quality

Full HD, 4K UHD

--

Music Capacity

48 albums

--

Photos and Video

480 photos/200 mins⁶

Up to 100MB/s²

Read Speed

Up to 160MB/s²

--

Write Speed

Up to 60MB/s²

C10, U1, A1

Class

C10, U3, V30, A2

Android phone/tablet

Devices

Phone, ActCam, Drone

Full HD

Video Quality

Full HD, 4K UHD

--

Music Capacity

96 albums

--

Photos and Video

960 photos/400 mins⁶

Up to 100MB/s²

Read Speed

Up to 160MB/s²

--

Write Speed

Up to 90MB/s²

C10, U1, A1

Class

C10, U3, V30, A2

Compare with similar items

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SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN6MA
SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN6MA
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Price$59.99-33% $41.99
List: $62.49		-23% $19.99
List: $25.99		$30.01$42.99$34.99
Delivery
Get it as soon as Sunday, May 18
Get it as soon as Saturday, May 17
Get it as soon as Saturday, May 17
Get it as soon as Saturday, May 17
Get it as soon as Saturday, May 17
Get it as soon as Saturday, May 17
Customer Ratings
4.84.8 out of 5 stars28,088
4.84.8 out of 5 stars119,352
4.74.7 out of 5 stars198,031
4.84.8 out of 5 stars15,675
4.74.7 out of 5 stars10,041
4.64.6 out of 5 stars864
Sold By
flash memory type
memory capacity
speed class

What's in the box

  • MicroSD
  • Adapter

    • Product Description

    Our highest-capacity microSD card is perfect for recording and watching Full HD video, (2) with room for even more hours of video. (7) Transfer speeds of up to 100MB/s ensure that you can move all your content blazingly fast—up to 1200 photos in just one minute. (6) Ideal for Android-based smartphones and tablets, this card’s A1 rating means that you can load apps faster too. (1) And, with its unprecedented 400GB capacity, this card lets you capture and store more than ever before. 1GB=1,000,000,000 bytes. Actual user storage less. Up to 100MB/s read speed; write speed lower. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. (1) Results may vary based on host device, app type and other factors. (2) Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors. (3) Card only. (5) Download and installation required. (6) Based on 4.1GB transfer of photos (Average file 3.5MB) with USB 3.0 reader. Results may vary based on host device, file attributes and other factors. (7) Approximations; results and Full HD (1920x1080) video support may vary based on host device, file attributes and other factors.

    Product information

    Technical Details

    Collapse all
    Summary
    Color ‎Grey, Red, Grey
    Special Feature ‎temperature_proof
    Read Speed ‎100 Megabytes Per Second
    Item Weight ‎0.01 Pounds
    Warranty Type ‎Limited
    Write Speed ‎[0.5-100] MB/s
    Hardware Interface ‎microSDXC
    Secure Digital Association Speed Class ‎Class 10
    Product Dimensions ‎0.43"L x 0.59"W
    Manufacturer ‎Western Digital Technologies Inc.
    UPC ‎619659161552
    Global Trade Identification Number ‎00619659161552
    RAM ‎256 GB
    Memory Speed ‎100 Megabytes Per Second
    Hard Drive ‎Memory Card
    Other Technical Details
    Item model number ‎SDSQUAR-400G-GN6MA
    Item Weight ‎0.16 ounces
    Item Dimensions LxWxH ‎0.04 x 0.59 x 0.43 inches
    Power Source ‎Hand-operated
    ASIN ‎B074RNRM2B
    Is Discontinued By Manufacturer ‎No
    Date First Available ‎August 31, 2017

    Additional Information

    Customer Reviews
    4.8 out of 5 stars 28,088 ratings

    4.8 out of 5 stars
    Best Sellers Rank #729 in Micro SD Memory Cards

    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.
    For warranty information about this product, please click here. [PDF ]

    Feedback

    SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-400G-GN6MA

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    Customer reviews

    4.8 out of 5 stars
    28,088 global ratings

    Review this product

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    Write a customer review

    Customers say

    Customers find the memory card works well with Nintendo Switch and Samsung Galaxy S10, offering good storage capacity and value for money. They appreciate its speed, noting no noticeable latency in apps or games, and find it easy to use with just plug-and-play functionality. The card receives positive feedback for its quality, with no reported issues, though some customers report corruption after 2 years of light use.

    AI-generated from the text of customer reviews

    Select to learn more

    871 customers mention "Works well"814 positive57 negative

    Customers find that the memory card works well, performing flawlessly and being compatible with various devices including the Switch and Samsung Galaxy S10.

    "...No problems. I appreciate its good quality, ample storage space, and value for money." Read more

    "...just speculation of course! But this card performs flawless... not only in my Galaxy Note 4 phone but also in my camera...." Read more

    "...So capacity, performance, and reliability goes without saying for these SD cards...." Read more

    "...has all the standard SanDisk hallmarks: high quality, nice look, good performance, nice looks, and it, of course, comes with an adapter in case you..." Read more

    659 customers mention "Storage capacity"566 positive93 negative

    Customers are satisfied with the memory card's storage capacity, noting it works as advertised and is great for storing pictures and videos, with one customer mentioning it transferred 166 GB of data successfully.

    "...No problems. I appreciate its good quality, ample storage space, and value for money." Read more

    "...the highest recommendations for this card.... you can now store mass amounts of 4K footage.... according to my tests so far, about 10+ Hrs of 4K @..." Read more

    "...So capacity, performance, and reliability goes without saying for these SD cards...." Read more

    "This card has not disappointed me yet. With huge amounts of space, and a transfer read speed listed at 100MB/s, it's a card that can serve all kinds..." Read more

    440 customers mention "Value for money"423 positive17 negative

    Customers find the memory card to be a great value, particularly noting its best $ per GB ratio.

    "...I appreciate its good quality, ample storage space, and value for money." Read more

    "...Happy with my purchase. 100% 400GB SanDisk SD card at a reasonable price." Read more

    "...For $160, seems a good deal...." Read more

    "...For the reasonable price that this card is, I found it to be an excellent buy. Overall I recommend this SanDisk 400 GB SD Card." Read more

    299 customers mention "Compatibility"293 positive6 negative

    Customers find the memory card compatible with Nintendo Switch, with multiple customers confirming it works well with the device.

    "...It also works great for the Nintendo Switch, so if you need substantial storage for cheap, this is your card...." Read more

    "...Last, I like that it comes with the MicroSD card reader, too...." Read more

    "...Thankfully the Razer 2 recognizes up to 2TB SD cards if I'm not mistaken, but the 366GB capacity this card gives me after formatting will more than..." Read more

    "...The one for the switch worked right away, the one for the 3DS needed to be reformatted into FAT32 using a partition master program before it could..." Read more

    234 customers mention "Speed"186 positive48 negative

    Customers praise the memory card's speed, noting no noticeable latency in apps or games, faster file transfer for both reading and writing, and transfer rates around 33MB/s.

    "...may be in burst abilities for use as internal memory but sustained transfer rates are great!......" Read more

    "...With huge amounts of space, and a transfer read speed listed at 100MB/s, it's a card that can serve all kinds of purposes—assuming your device..." Read more

    "...I love this: I never really have to download pictures or video from my phone, and I can permanently store whatever movies, documents, or other files..." Read more

    "...I didn't run any professional benchmark tests but it's faster than the 256GB card I was using before when loading. Wow...." Read more

    179 customers mention "Card quality"179 positive0 negative

    Customers find the memory card to be of excellent quality, reporting no product issues and noting that they never fail.

    "This was just what I needed to use with my digital camera. No problems. I appreciate its good quality, ample storage space, and value for money." Read more

    "...SanDisk hallmarks: high quality, nice look, good performance, nice looks, and it, of course, comes with an adapter in case you wish to use this in a..." Read more

    "...Fortunately the card fails safe, so I was able to access it on my computer with a reader and copy all the data on it...." Read more

    "...Super simple. Next to no effort. You are good to go no glitches or hang ups...." Read more

    64 customers mention "Ease of use"64 positive0 negative

    Customers find the memory card easy to use, particularly with the Switch console, as it just plugs and plays.

    "...Super simple. Next to no effort. You are good to go no glitches or hang ups...." Read more

    "I bought this for extra storage on my Nintendo Switch. It is easy to install and is already formatted correctly to transfer memory on my switch...." Read more

    "...my Hero5 Session and the device recognized the card right away, no need to format...." Read more

    "...SD card for my Nintendo Switch, which of course was an insanely easy installation process..." Read more

    74 customers mention "Corruption rate"4 positive70 negative

    Customers report issues with the memory card's durability, with multiple units failing after 17 months of light use or breaking after the return window expires.

    "...failures of legit microsds are extremely rare even in "high endurance" scenarios, and b)..." Read more

    "...It seems a bit faster than my old card. A nagging data corruption issue I had with my BoTW install has stopped completely." Read more

    "...card with the Switch, it has to be turned off completely or risk destroy the new SD card...." Read more

    "...more than a few GB of data to these fake MicroSD card, your data may be corrupted. Say goodbye to those priceless wedding photos...." Read more

    Cheap way to add storage to some computers...
    5 out of 5 stars
    Cheap way to add storage to some computers...
    I bought this to add storage capacity to a SurfaceBook with a 512GB SSD. It adds 366GB of usable space which shows up as a separate USB drive in my computer's base directory. If you have a computer with a dedicated SD card slot, this MicroSD card can expand your laptop's storage without protruding beyond the edge of the notebook chassis if used with an adapter in place of a regular SD card (see the photos for how this works). And now the price for 400GB is a semi-reasonable $249, making this roughly $.62/gb. The cost per gigabyte sweet spot seems to lie at the 32-64GB level, with SanDisk storage in that size range costing $.30/gb and Samsung roughly the same. At this price, it's cheaper to throw a MicroSD card in a slot than to try to add storage to a non-upgradeable computer like the MacBook Pro or SurfaceBook. But if you do go this route, remember that flash memory of this sort is less-reliable than a disk. Don't use it for irreplaceable or mission-critical content. I use this BASEQI Aluminum MicroSD Adapter for Microsoft Surface Book & Surface Book 2 13.5" adapter. Other manufacturers also make adapters that permit a MicroSDXC card to be used in place of an SD card as a semi-permanent addition to laptop memory. The adapter allows the card to fit entirely within the laptop frame (usually impossible with full-size SD cards in modern laptops which only provide shallow ports), becoming nearly because the adapter's slim exterior portion matches the laptop's surface. Search the adapter maker's other listings and you will find similar products for MacBook Pros with SD card slots. Throughput between this and the laptop's internal SSD is passable, not great, averaging about 30 MB/sec with a folder filled with pictures. See pictures below for input and output benchmarks.
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    Top reviews from the United States

    • Kate
      5.0 out of 5 stars SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter
      Reviewed in the United States on January 8, 2025
      Verified Purchase
      This was just what I needed to use with my digital camera. No problems. I appreciate its good quality, ample storage space, and value for money.
      Helpful
       Report
    • A. J.
      5.0 out of 5 stars Compatible with everything I've tried and super fast for 4k Video!
      Reviewed in the United States on April 24, 2018
      Verified Purchase
      Bought this for my Paralenz underwater camera that shoots up to 4K 30fps.

      My camera manufacturer says 128gb V30 is the required max but this card is rated for a min of 10mb/sec & and the write speed is undocumented publicly after contacting Sandisk, with transfer speeds to 100mb/sec.

      Maybe they won't release write speeds because it performs so well they don't want it competing with their faster rated cards?.... just speculation of course!

      But this card performs flawless... not only in my Galaxy Note 4 phone but also in my camera. Leave it formatted in the default exFat and your good!

      After much research it appears its only weakness may be in burst abilities for use as internal memory but sustained transfer rates are great!... so much so that 4k @ 30fps video was no problem in testing.

      I'm also astonished this card works so well in my Note 4, I had a 128gb Sandisk in before and this definitely feels faster.

      At this point I have the highest recommendations for this card.... you can now store mass amounts of 4K footage.... according to my tests so far, about 10+ Hrs of 4K @ 30 fps!

      I've found other brands often give similar speeds as compared to Sandisk but fail miserably long term in reliability.... Do you really want 400 GB worth of stuff lost because you wanted to save a few bucks with another brand?

      Sandisk is the most reliable IMO and it's amazing they remain at the front of the pack.

      It's not the fastest dog out of the gate that wins, but the one who can make it to the finish line first!

      I own 3 of these now.
      I can film 2.7k @ 60fps and put 17 one hour dives in a week long dive vacation and I only use about 180gig!

      Its great not having to tote a big laptop on my trips!

      I have one just for backup too on my trips .. Haven't had to use it yet!
      41 people found this helpful
      Helpful
       Report
    • Broc M. Krietemeyer
      5.0 out of 5 stars Lots of storage (400GB) and impressive speed from SanDisk, a trusted brand
      Reviewed in the United States on January 18, 2019
      Verified Purchase
      Not much to say other than to remark on the validity of the SD card I received through Amazon actually being from SanDisk.
      SanDisk is one of, if not the biggest, SD card manufacturer and the quality of their products is the golden standard. So capacity, performance, and reliability goes without saying for these SD cards. However, I have read quite a lot of reviews claiming that the ones they received were imposters and, while I do not claim they are mistaken or not, I can say that my 400GB one I received from Amazon seems to check out through every test I've run it through.
      Amazon has quality customer care and product replacement/return policies for the ginormous corporation they are, so if you have any issues with your product I'm sure you can get it worked out within reason. There are a lot of different resources for checking the validity of SD cards online and you can find them all with a simple search on a quality search engine website. If you are concerned, I suggest going that route or contacting local IT support to see what they can do for you.

      PROS:
      SanDisk. Enough said. Quality and performance.

      CONS:
      Obviously, verrry slim chance of the SD card being a fake. Technology is amazing these days and there are people out there driven to make a quick buck if they've got the materials and the know-how. Even giants like Amazon can fall victim to these numerous and unethical kinds of practices.

      Happy with my purchase. 100% 400GB SanDisk SD card at a reasonable price.
      One person found this helpful
      Helpful
       Report
    • Ray
      5.0 out of 5 stars We're Finally at About Half a Gb for Micro Storage! Yea!
      Reviewed in the United States on June 1, 2018
      Verified Purchase
      This card has not disappointed me yet. With huge amounts of space, and a transfer read speed listed at 100MB/s, it's a card that can serve all kinds of purposes—assuming your device supports this storage amount—for photos, music, videos, and just plain old file storage. I am using mine with the new Sony NW-A45/L Walkman with Hi-Res Audio, Moonlit Blue (2018 Model), and it has worked marvelously so far, with all the memory being "seen" by the player, and some very good transfer speeds. I have not yet specifically tested the actual speed, but will do so soon with the Black Magic speed tester, and will update this review with that report.

      Right now (mid-2018) this card is running at just under $200. I don't suspect it will drop anytime soon, since its the only guy on the block, so if you have a use for it, you might as well get it now. I doubt this will even be marked down much towards the end of the year, although I could be wrong, due to its unique status. Having said that, if the price is still too high, keep an eye on it, because there MAY be occasional rebates, two-day sales, etc.

      It has all the standard SanDisk hallmarks: high quality, nice look, good performance, nice looks, and it, of course, comes with an adapter in case you wish to use this in a camera that takes the standard sized SDXC cards. I can put almost my entire lossless audio library on this one card, which is amazing. Five stars, and an update soon with the results of the speed test I plan to perform.
      3 people found this helpful
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    • KingKhan617
      5.0 out of 5 stars Good
      Reviewed in the United Arab Emirates on September 25, 2019
      Verified Purchase
      Bought it for my new Note10+ card is good good price 400gb is ideal capacity works good. Comes with adaptor so I can even use it on my laptop to copy data.
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    • taka48106
      5.0 out of 5 stars 安定している。
      Reviewed in Japan on January 17, 2019
      Verified Purchase
      エラーもなくカメラ写真やダウンロードした映画や動画、音楽ファイルの保存に役立っています。
      まだ使い始めですが、今の所大満足です。
      Report
    • Anugrah S.
      5.0 out of 5 stars So lucky
      Reviewed in Saudi Arabia on March 19, 2022
      Verified Purchase
      what a bargain got 400gb with a price of 128gb
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    • Mohamed Al Shaiba
      5.0 out of 5 stars You’ll never run out of space on your switch
      Reviewed in the United Arab Emirates on March 9, 2021
      Verified Purchase
      I recommend SanDisk because they make great product
      Report
    • Amazon カスタマー
      2.0 out of 5 stars 書き込み遅し
      Reviewed in Japan on December 14, 2019
      Verified Purchase
      同じSandisk Ultra Microsdxcの２００GBのマイクロｓｄカードもありますがスマホ装着時の書き込みは圧倒的に遅いです．
      Report