The following files are associated with virtual machines:

.vmx Virtual machine configuration

.nvram VM BIOS

.vmdk Virtual disk

.vmsd Dictionary for snapshots and associated disk

.vmss Virtual machine suspend file

-Snapshot#.vmsn Virtual machine configuration of a snapshot

-flat-vmdk Disk that contains the data

-f001.vmdk First extend of preallocated disk split into 2gb files

-s001.vmdk First extend of growable disk split into 2gb files

-delta.vmdk Snapshot differences file

When a virtual machine is created and not powered on, these are its files:

When a virtual machine is powered on, these are its files:

When a virtual machine is powered on ans has a snapshot, these are its files: