2019 Mac Pro have two SATA ports, but you have to buy a Promise bracket to install any SATA drives using the two native ports. You can't install any SATA drives as Apple sends you the 2019 Mac Pro.I should start my own thread. Apologies for going of topic on your thread Alain! I just tok possession of the Mac Pro 2019. It'd be very convenient - of course - to just take some of the SSDs in my older 5,1 bays. Does anyone know whether the Samsung 860 is compatible? Assuming it's not? Apple requires I purchase different SSD?
Promise Pegasus J2i 8TB Internal Storage Enclosure for Mac Pro
Promise Pegasus J2i two-drive internal storage enclosure delivers 8TB of SATA storage for your Mac Pro. This module can be installed in your Mac Pro and connects to the main logic board with included cables. You also have space to add a second 3.5-inch SATA drive to your system.
www.apple.com
You can use PCIe SATA adapters to install your SSDs too, like OWC Accelsior S
OWC Accelsior S Storage Expansion With a Speed Boost
Accelsior S is the simple solution to add a high speed SATA 6G drive to silver Mac Pro towers otherwise restricted to 3G architecture.
eshop.macsales.com