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The SanDisk Extreme Pro 256GB is a UHS-I microSDXC card rated U3, V30 and A2, with quoted reads up to 170MB/s and writes up to 90MB/s. It is built for 4K UHD video in action cameras, drones and phones, and SanDisk rates it shockproof, temperature-proof, waterproof and X-ray-proof. Its A2 rating targets faster app loading on Android. Against V60 and V90 cards it is a UHS-I part, so sustained writes trail the fastest cards, and its 3.2-out-of-5 average from 65 ratings shows a divided reception.
In stockSold by First Choice OnlineReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Ratings average 3.2 out of 5 from 65 buyers, so opinion is split. Some owners report the card working as intended for 4K recording and fast transfers; others report failures or speeds below the quoted figures.
The SanDisk Extreme Pro is a 256GB microSDXC UHS-I memory card that comes with an adapter. It is made for Android smartphones, action cameras and drones. It records 4K UHD video, Full HD video and high-resolution photos.
It reads at up to 170MB/s and writes at up to 90MB/s. At the read speed, 1000 high-resolution photos and 30 minutes of 4K video (24GB) transfer in less than 3 minutes. The UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings support uninterrupted 4K UHD and Full HD recording. The A2 rating gives faster app performance on a smartphone.
The card is shockproof, temperature-proof, waterproof and X-ray-proof. It is compatible with the MobileMate USB 3.0 microSD card reader, which transfers at up to 170MB/s.
