OsBash
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By default, osbash will put into this directory its base disk images (base-*-<distro>.vdi), the VM export images (labs-<distro>.ova), and all installation ISO images it may download.
- 'img' folder stores all the base disk and ISO images.
- To find individual virtualbox disk images, please look into the virtualbox default machine folder.
- For Linux: "~/VirtualBox/labs/"
- In case your default folder is at another location (manually set) please get the location by opening the VirtualBox GUI at this location "File>Preferences>General>Default Machine Folder"