The Western Digital SN730 is a solid-state drive in the M.2 2280 form factor, launched in 2019. It is available in capacities ranging from 256 GB to 1 TB. This page reports specifications for the 256 GB variant. With the rest of the system, the Western Digital SN730 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-00705-A2 Triton MP28 from WD, a DRAM cache chip is available. Western Digital has installed 96-layer TLC NAND flash on the SN730, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The SN730 is rated for sequential read speeds of up to 3,150 MB/s and 2,100 MB/s write; random IO reaches 270K IOPS for read and 280K for writes.
At its launch, the SSD was priced at 89 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 200 TBW, a typical value for consumer SSDs.