Western Digital is launching a behemoth, consumer-oriented 4 TB SSD based on its WD Blue product line. The WD Blue 4 TB uses the SATA interface (for which controllers are still slightly cheaper than for NVMe solutions) with a Marvell 88SS1074 4-channel controller with a 64-layer 3D TLC NAND from SanDisk. Read and write speeds are basically SATA III-bound (sequential 560MB/s read and 530MB/s write speeds, with random 4K read/write of 95K/82K IOPS.) The WD Blue 4TB SATA SSD has its official availability date on May 13th, but it's already popping up here and there around retailers' shops in Europe. The 4 TB SSD is being priced at 545 euro, which seems to be inline with expectations for such a capacity level. Quick napkin math saying that these should find a home at the sub-$500 level is very likely accurate, considering past pricing practices from manufacturers between the European and US markets.