Below is a list of files for a Windows 7 virtual machine with VMware Workstation without any snapshot entries present:
Below is an updated list when a snapshot had been created.
Below are the contents of the .vmsd file:
The snapshot list file contains the name of the .vmsn file, the snapshot name, the description, the name of the original disk and subsequent snapshot files. Below is the contents of the .vmsd file after the snapshot had been deleted.