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The SanDisk Ultra is a UHS-I microSDXC card rated A1 for app performance, with read speeds up to 120MB/s and a full-size SD adapter in the box. The 512GB capacity holds many hours of Full HD video, which suits Android phones, tablets and MIL cameras. It is a mainstream card, not a high-endurance or V30-rated one, so it trails SanDisk's Extreme line for sustained 4K recording and heavy write workloads. This is the older version, which SanDisk has discontinued; the current Ultra line replaces it.
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Owners generally find the SanDisk Ultra reliable for phones, tablets and cameras, and praise the capacity and quick transfers with a good reader. Complaints tend to focus on write speed and on cards that failed or arrived slow, and some note the A1 rating matters less on newer devices.
This is a 512GB SanDisk Ultra microSDXC UHS-I memory card that comes with an adapter. It is meant for Android smartphones and tablets and for mirrorless interchangeable-lens (MIL) cameras. This version has been discontinued by the manufacturer.
The card reads at speeds of up to 120MB/s, which SanDisk says can move up to 1000 photos in a minute. Reaching that speed requires a compatible device, and write speeds are lower. Performance may vary with the host device, interface and usage conditions.
It has an A1 rating for app performance, which is 1500 read IOPS and 500 write IOPS. The capacity can store more hours of Full HD (1920x1080) video, though support varies by host device and file attributes. Actual user storage is less than the stated capacity.
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