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Small red and black microSDXC card with gold contacts

SanDisk

SanDisk Extreme 256GB microSDXC U3 V30 90MB/s

SKU CH-7X7F-XH8N2

256GB microSDXC card rated U3 V30 with 90MB/s read and 60MB/s write for 4K video

  • TypemicroSDXC
  • Captures 4K Ultra HD and Full HD video with U3 V30 speed class
  • Transfers files faster with read speeds up to 90MB/s
  • Records continuous action with write speeds up to 60MB/s
  • Provides 256GB capacity for extended recording sessions
  • Withstands extreme conditions from -25 to 85°C operating temperature

256GB microSDXC for 4K capture

This SanDisk Extreme card provides 256GB of storage in the microSDXC form factor. It carries UHS Speed Class 3 and Video Speed Class 30 ratings for sustained 4K video recording. Read speeds reach up to 90MB/s while write speeds hit up to 60MB/s. The operating range spans -25°C to 85°C.

Suits 4K cameras and Android devices

The card fits smartphones, tablets and mirrorless cameras that accept microSDHC or microSDXC UHS-I media. It is built to withstand temperature extremes, water, shock and X-ray exposure. Users needing sustained write performance above 60MB/s for high-bitrate codecs should consider faster media. Devices limited to legacy speed classes will not benefit from the U3 and V30 ratings.

U3 and V30 ratings enable 4K recording

The Video Speed Class 30 marking guarantees a minimum sequential write speed of 30MB/s, which is the decisive factor for 4K Ultra HD capture. Without this rating, frame drops or recording stops can occur. The 256GB capacity allows extended shooting sessions before offloading footage.

Highlights

  • Captures 4K Ultra HD and Full HD video with U3 V30 speed class
  • Transfers files faster with read speeds up to 90MB/s
  • Records continuous action with write speeds up to 60MB/s
  • Provides 256GB capacity for extended recording sessions
  • Withstands extreme conditions from -25 to 85°C operating temperature

Specifications

TypemicroSDXC

Questions about this item

How do I install the SanDisk Extreme 256GB microSDXC card and what step is often missed?

Insert the card into a microSDXC UHS-I slot with the label facing up until it clicks; the step often missed is checking that the host device supports microSDXC UHS-I for full 90MB/s read and 60MB/s write performance.

What maintenance or replacement will this card need later?

No scheduled maintenance is required; the card is temperature proof from -25 to 85°C, water proof, shock proof and X-ray proof, so replacement only occurs if physical damage or capacity limits are reached.

What limit appears first during sustained 4K video recording on this card?

The V30 rating guarantees a minimum 30MB/s sequential write; sustained 4K recording will hit that write-speed floor before the 256GB capacity fills.

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