The 12TB SATA Hard Drive from Promise Technology has been designed for their Pegasus J2i Internal Storage Enclosure. The Pegasus J2i lets users expand the internal storage of their Mac Pro (Late 2019) and features two 3.5" drive bays, one of which contains an 8TB 7200 rpm SATA hard drive. Using this hard drive, you'll be able to increase the storage capacity of your J2i by installing an additional 12TB into its second drive bay.
Please note that this listing is only for one 12TB hard drive. The Pegasus J2i and any necessary cables are sold separately.
UPC: 704118169559