Transcend 64GB SDXC Memory Card (300S)

This is a Transcend 64GB SDXC card from the SDXC/SDHC 300S line (part number TS64GSDC300S). It is the general-purpose UHS-I card for a stills body, a camcorder or a monitor/recorder that logs to SD - enough room for a long shooting day of raw frames or hours of HD, at a price that makes it sensible to keep several in the bag. Transcend rates the 300S family at up to 100 MB/s read and 85 MB/s write, and notes that the U3 and V30 speed grades needed for sustained 4K recording apply only to its 256GB and larger capacities; at 64GB the card carries the Class 10 / UHS-I U1 grade, so check the frame rate and codec your camera demands before committing it to a 4K job.

The card uses 3D NAND flash, has a mechanical write-protect switch, and survives -25 C to 85 C, which covers everything from an outdoor winter shoot to a hot equipment case. Transcend rates it for 10,000 insertion and removal cycles and backs it with a five-year limited warranty; the free RecoveRx utility can attempt recovery of images from a card that was formatted by mistake.