Convert to Dynamic Disk

Hello,

I originally setup Parallels with a fixed disk size, and overestimated my needs. I created 400GB disks, and only need 50. To decrease backup time, I'd like to convert the disk to an expanding disk, or reduce the size.

Is there any downside to reducing the disk size of the VM (if I were to say, cut it down to 100GB), and am only currently using 40?

Alternatively, is there a way to change it to a dynamic disk that grows automatically, and just cut it down to 50GB?

What is the best practice for doing this, other than simply creating new VMs?

Thanks

 

Is there an answer to this? This is exactly what I need to do...thanks

 

This is possible via command line utility if there are no snapshots:
prl_disk_tool convert --expanding --hdd <path to *.hdd>

 

Thanks, but this did not do anything.

 

Why?
Works for me:
$prl_disk_tool convert --plain --hdd harddisk.hdd

Operation progress 100 %

$ du -h harddisk.hdd

1.0G harddisk.hdd

$ prl_disk_tool convert --expanding --hdd harddisk.hdd

Operation progress 100 %

$ du -h harddisk.hdd

1.1M harddisk.hdd