It comes with a 128MB DRAM cache and has the USB bridge and connector built-in rather than using a standard SATA connection. Encased within its plastic enclosure, WD opted to utilize a Shingled Magnetic Recording (SMR, a technology that overlaps data tracks to increase density)-based 2.5” HDD, model: WD50NDZW-11MR8S1 on our 5TB sample.
