Two companies have announced 1 terabyte microSDXC cards at Mobile World Congress 2019:
Micron's fingernail-sized card uses 96-layer 3D NAND configured as QLC (4bits/cell) storage and delivers up to 100MB/s read and 95MB/s write burst performance helped by a dynamically sized SLC cache.
WD's SanDisk's UHS-I microSDXC, meanwhile, boasts "up to" speeds of 160MB/s reads and 90MB/s writes.
[...] Random IO is up to 4,000 IOPS for reads and 2,000 for writes for both Micron and SanDisk's kit.
The SanDisk 1 TB microSD card will launch at $450 in April, or $200 for a 512 GB version.
The Secure Digital 3.01 specification defines a maximum capacity of 2 TB (2048 GB) for SDXC and microSDXC cards. The Secure Digital 7.0 specification introduced the Secure Digital Ultra Capacity (SDUC) format with a maximum capacity of 128 TB.
Also at Tom's Hardware, The Verge.
See also: 512 GB of UFS 3.0 Storage: Western Digital iNAND MC EU511
Previously: SanDisk Announces a 400 GB MicroSD Card
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(Score: 0) by Anonymous Coward on Wednesday February 27 2019, @01:53PM
TLC devices built like this, creep along at 10-11 Mb/s after the SLC cache is filled. QLC will be worse.