The 12 TB WD Gold drive offers increased security and durability for enterprise customers. It comes with eight 1.5 TB platters, 256 MB cache, 255 MB/s data transfer rates, and has an MSRP of US$521.99.
https://www.notebookcheck.net/Western-Digital-releases-the-12-TB-WDD-Gold-HDD.249386.0.html