First removable universal flash storage cards bring 256Gbyte to mobile devices

Claimed to be the first removable memory cards, Samsung offers 32, 64, 128 and 256Gbyte capacities for its JEDEC Universal Flash Storage (UFS) 1.0 Card Extension Standard cards. They are for use in high-resolution mobile shooting devices such as DSLRs, 3D VR cameras, action cams and drones.

For example, the 256Gbyte UFS card is claimed to improve user experiences, especially in high-resolution 3D gaming and high-resolution movie playback. It provides more than five times faster sequential read performance compared to that of a typical microSD card, reading sequentially at 530Mbyte/s which is similar to the sequential read speed of the most widely used SATA SSDs, says the company. Users can read a 5Gbyte, full-HD movie in approximately 10 seconds, compared to a typical UHS-1 microSD card, which would take over 50 seconds with 95Mbyte/s of sequential reading speed. At a random read rate of 40,000 IOPS, the 256Gbyte card delivers more than 20 times higher random read performance compared to a typical microSD, which offers approximately 1,800 IOPS.

The same card processes 35,000 random IOPS, which is a read rate 350 times higher than the 100 IOPs of a typical microSD card. It attains a 170Mbyte/s sequential write speed, almost doubling the top-end microSD card speed, claims the company, to significantly reduce multimedia data downloading time, photo thumbnail loading time and buffer clearing time in burst shooting mode. To shoot 24 large/extra fine JPEG photographs (1,120Mbyte-equivalent) continuously with a high-end DSLR camera, the 256GB UFS card takes less than seven seconds, compared to a UHS-1 microSD card which typically takes about 32 seconds, at 35Mbyte/s.

For power-efficient data transport, the card supports multiple commands with command queuing features and enables simultaneous reading and writing through the use of separately dedicated paths, doubling throughput.


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