SanDisk 400GB Extreme microSDXC UHS-I Memory Card & Adapter

Last updated date: November 4, 2020

DWYM Score

9.6

SanDisk 400GB Extreme microSDXC UHS-I Memory Card & Adapter

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We looked at the top Memory Cards and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Memory Card you should buy.

Editor's Note November 4, 2020:
Checkout The Best Memory Card for a detailed review of all the top memory cards.

Overall Take


In our analysis, the SanDisk SanDisk 400GB Extreme microSDXC UHS-I Memory Card & Adapter placed 2nd when we looked at the top 10 products in the category. For the full ranking, see below.

From The Manufacturer

With the SanDisk Extreme 400GB(1) microSD UHS-I Memory Card get extreme speeds for fast transfer, app performance, and 4K UHD video.(2) Ideal for your Android smartphone, action cameras or drones, this high-performance microSD card handles 4K UHD video recording, Full HD video and high-resolution photos. The super-fast SanDisk Extreme microSDXC memory card reads up to 160MB/s* and writes up to 90MB/s.* Plus, it’s A2-rated, so you can get fast application performance for an exceptional smartphone experience.(7) | Not all devices support microSD memory card formats. Check with your device manufacturer for more details. | * For 128GB-400GB: Up to 160MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-I 104MB/s, requires compatible devices capable of reaching such speeds. Up to 90MB/s write speeds. 1MB=1,000,000 bytes. | (1) 1GB=1,000,000,000 bytes. Actual user storage less. | (2) Compatible device required. Full HD (1920x1080) and 4K UHD (3840 x 2160) support may vary based upon host device, file attributes and other factors. | (3) Download and installation required. | (4) Card only. (5) UHS Speed Class 3 (U3) designates a performance option designed to support real-time video recording with UHS-enabled host devices. Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS-enabled host devices. | (6) Registration required; terms and conditions apply. | (7) For 64GB-400GB: A2 performance is 4000 read IOPS, 2000 write IOPS. Results may vary based on host device, app type and other factors. | (8) Read only; based on internal testing. Results may vary based on host device, file attributions and other factors.

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