My mini-server has 2 hard disks: 1xSSD and 1xHDD.
ESXi 7.0 (update 3) is installed on the SSD.
However, that disk is not available as a datastore.
This is what I see in the "Datastores" tab:
But that is the HDD not the SSD.
In the "Devices" tab I see the SSD:
But when I try to create a new datastore I reach here:
And I can't move forward.
I also tried to repartition the SSD by deleting that big VMFSL partition but it failed.
What you have seen is not new in absolute terms, it coincides with the introduction of the ESXi version 7.0 product and has as an explanation in what is written in the official documentation, you can consult it here: