Freeing up space · Stopping, undoing and apps in the way
Will virtual machine disks and disk images grow bigger when moved to the fast drive?
Short answer: No. Files that only use part of their apparent size, like some VM disks and disk images, keep that efficiency when Storage Studio moves a folder, as long as the drive's format supports it.
No — when Storage Studio moves a folder, files that only use part of their apparent size, such as some virtual machine disks, disk images and pre-allocated databases, keep that efficiency on your fast drive instead of ballooning to their full size.
That matters on the destination too: a file that shows 100 GB but uses 20 GB on your Mac should still use roughly 20 GB on the drive. If the fast drive is formatted in a way that can't store files like that, they may take more room there. For drive formats, see the External drives FAQ.