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:


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