Introduction If you have a VM using dynamically allocated disks, you may have the need to compact them to save some free space. It happened that I have to shrink a Win10 VM after the upgrade to 1809, hosted on my Windows 10 notebook. Using Virtualbox for Windows, actually, this option seems to be available only for VDI files. Round #1 The first step is … Continue reading HOWTO compact VDI disks »