I’ve bought a sata card and a M.2 M-Key to PCI-express adapter:
On page 3 of the ROCK3 schematic https://dl.radxa.com/rock3/docs/hw/3a/rock3a_v1.3_sch.pdf I see the following:
The M.2 M-Key slot on the ROCK3A provides 2 lanes of PCI Express 3.0.
The M.2 E key slot on the ROCK3A provides 1 lane of PCI Express 2.0.
It turns out the SATA card only used one lane of PCI Express 2.0, so this would fit perfectly with the M.2 E key slot on the ROCK3A
Does anybody know a shop that sells the needed M.2 E-key to PCI Express X1 slot?