Mac Finder shows guest windows 10 .PVM file size is 178GB. Having difficulty determining which folders and files account for the size on disk. Parallels and Windows Disk Optimizing and Disk Clean Up tools are helpful but do not provide detail necessary and sufficient to diagnose the problem. Internal to Windows the VM file size shows as 57GB used and 254GB free, a sum total of 311GB that makes no sense when contrasted against a Mac OS Finder file size on disk reported to be 178GB. I have enabled daily optimization and eliminated unnecessary snap shots without any significant reduction to the .PVM on disk file size. Thanks in advance for advise and helpful suggestions on how to achieve and maintain a minimal optimized .PVM file size on disk. Trekrap