Over the last six years with three different Tablos, I started with an external Seagate Expansion, then needed more space, upgraded to an external 6 TB WD Elements. While I love SSDs, using them to do five or six daily recordings really makes a lot of rewrite cycles on them – not sure that is good long-term solution?
I have been running my latest build since December 2020. I did not want to post about it until I had a few months of heavy duty recording use on it. I have to say that the wire mesh external enclosure keeps the drive really, really cool and the Tablo likes the controller chipset: https://www.amazon.com/Inateck-Inch-Enclosure-Support-SA01003/dp/B07N63MXN6/
The drive is made for 24x7 video surveillance and the Seagate Skyhawk drives larger than 4 TB are 7,200 RPM: https://www.amazon.com/Seagate-Skyhawk-Surveillance-Hard-Drive/dp/B07H28M89D/