This command shows information about a medium, notably its size, its size on disk, its type and the virtual machines which use it.
Note
For compatibility with earlier versions of VirtualBox, the "showvdiinfo" command is also supported and mapped internally to the "showmediuminfo" command.
VBoxManage showmediuminfo [disk|dvd|floppy] <uuid|filename>
The medium must be specified either by its UUID (if the medium
is registered) or by its filename. Registered images can be listed by
VBoxManage list hdds,
VBoxManage list dvds,
or VBoxManage list floppies, as appropriate.
(see Section 8.4, “VBoxManage list”
for more information).