If you find that the disk drive space you originally allocated for a Virtual Machine (VM) under VMWare is now inadequate, the process for increasing the size of the drive allocated to the VM is fairly simple, but you will have to delete any existing snapshots before you can increase the size of the disk drive for the VM, which, though easily done, can take take some time - I found it took an hour on my MacBook Pro to delete a snapshot for a Windows XP VM. Once you've deleted existing snapshots, you can then expand the disk drive size to accomodate your needs. Files with a .vmdk extension are created to hold the VM's disk drive.
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