Creating the Metrics Store virtual machines fails with "Cannot add Template"

Issue

In Metrics Store Installation Guide step 8 in chapter 2.1 (Creating the Metrics Store virtual machines) fails with:

    "msg": "Fault reason is \"Operation Failed\". Fault detail is \"[Cannot add Template. Low disk space on Storage Domain SD1.]\". HTTP response code is 409."

and there is no info how much space is needed