example:  www.amazon.com/YATENG-Controller-Expansion-Card-Support-Converter/dp/B07JJTVGZM/
G'day....again. Closing in on an R12 order but two details remain of interest....if you have a moment. 1) In the optional configuration below, will the 2TB SATA drive have any content upon delivery?    I anticipate the OS will be completely contained on the C: M.2 1TB SSD.  1TB M.2 PCIe NVMe SSD (Boot) + 2TB 7200RPM SATA 6Gb/s (storage) 2) I think these interesting entries are by '5 Rhenium' in two different storage discussions...both addressing the mechanical implementation of SSDs into an Aurora which has but a single M.2 location.   Could anyone elaborate on this.  I will have a fine 1TB  Samsung 970 EVO Plus NVMe M.2 SSD sitting idle as a result of the retirement of my existing workstation and I'd love to reuse it in this new R12.  "I forgot to mention, after you've verified everything works, you can add the oem drive back on the bottom x16 (x8) slot using a $10 pcie adapter, and you will have a total of 3TB of m2 nvme drive space." "Also, you can add an m2 nvme drive or two via pcie adapter(s)." You can image the oem drive for backup to c:, and then wipe it completely including the boot partition.  Your pc allows for boot from pcie so depending on your bios selections you could also it as a dual boot option for example. 
Aurora R12, regarding storage