Here is the theory behind what we are doing
1- Fill all empty space with zeros, you can do that by writing a gigantic file full of zeros to fille up all empty space then crash when no space is left to put the file
cat /dev/zero > zero.fill;sync;sleep 1;sync;
Delete the file we just made, zeros are left behind
rm -f zero.fill
Shut down the VM, and go to the windows host running the vmware workstation
Navigate to the directory where the .vmdk files are located.