Kioxia ships UFS 4.1 storage with BiCS FLASH for mobile devices

Kioxia is shoving QLC-based UFS 4.1 into phones, betting smaller packages and smarter controllers can offset density downsides.

Product moves at a glance

• Kioxia started sending early UFS 4.1 storage units to device makers.
• The push targets bigger phone storage without burning extra PCB space.
• Capacity tiers roll out at 512 GB and 1 TB.

Physical footprint shift

• Package size drops to 9 by 13 millimeters.
• Older footprint sat at 11 by 13 millimeters.
• Smaller storage frees routing space for radios, batteries, or cameras.

Flash tech and controller bets

• The parts rely on BiCS FLASH eighth-generation 3D NAND.
• Cell design shifts to QLC rather than common TLC.
• Higher density leans hard on firmware, controllers, and error correction.

Performance numbers that matter

• Sequential write rates rise about twenty-five percent versus prior models.
• Random-read speed jumps near ninety percent based on Kioxia's claims.
• Random-write speed nearly doubles, shaping everyday phone responsiveness.
• Write amplification drops as much as three-point-five times.