Hello folks.

I want to buy a bigger SSD than the one supplied.   Looking at the specs in the manual via lookup the service tag, it says

Solid-state drive

One M.2 drive (SATA or PCIe/NVMe)

I seem to recall some fuss about the bus type needing to be one or the other.   What is currently the best bus type for this ?

Rgds and thanks in advance