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The SanDisk Extreme 512GB microSD card is a UHS-I card rated for up to 190MB/s reads and 130MB/s writes, with U3 and V30 video classes for 4K and 5K recording. It ships with a full-size SD adapter and is listed as compatible with the original Nintendo Switch, not the Switch 2. It suits action cameras, drones, phones and handheld consoles where fast offload and steady write speed matter. Against rival UHS-I cards it is a proven, widely used line, though it cannot match UHS-II cards in a UHS-II reader and its top read speed needs a compatible host.
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Owners of the Extreme line generally report reliable performance in cameras, drones and the Switch, with read and write speeds close to the ratings on good hardware. Complaints center on speeds falling short in older or budget devices and on the usable capacity being lower than the label.
The SanDisk Extreme is a 512GB microSDXC card that comes with an adapter. It is a UHS-I card for action cameras, digital cameras, drones, smartphones and tablets. It is compatible with the Nintendo Switch, but not the Nintendo Switch 2.
Read speeds reach up to 190MB/s with SanDisk QuickFlow Technology, which goes beyond the UHS-I 104MB/s rate. Write speeds reach up to 130MB/s. Both figures are based on internal testing, and a compatible device is needed to reach them. Actual speeds may be lower depending on the host device, usage conditions and other factors.
The card is rated UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) for 4K and 5K UHD video, with a sustained video capture rate of 30MB/s. Support for Full HD, 4K and 5K depends on the host device and file attributes. The A2 rating means 4000 read IOPS and 2000 write IOPS for faster app loading and in-app performance. For maximum speeds, pair it with the SanDisk Professional PRO-READER SD and microSD, sold separately.
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![SanDisk 512GB Ultra microSDXC UHS-I Memory Card with Adapter [New Version]](https://cdn.shopify.com/s/files/1/0672/4812/8170/files/61tiwF99WYL._AC_SX679.jpg?width=600)
