Snapshot Files - VMware
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vm...12.02.2020 · Snapshot file that represents the difference between the current state of the virtual disk and the state that existed at the time the previous snapshot was taken. The filename uses the following syntax, S1vm-000001.vmdk where S1vm is the name of the virtual machine and the six-digit number, 000001 , is based on the files that already exist in the directory.
VMware Snapshots Explained - vMiss.Net
https://vmiss.net/vmware-snapshots03.09.2020 · The VMware snapshot is only open long enough for the storage snapshot to take place. In the case of NetApp (yeah, I worked there too), it is near instantaneous. The backup itself is then done from the storage snapshot, and you can even set the backup to be preformed from the snapshot you’ve replicated to your secondary array.