If you don’t care about the installation process, download a pre-installed MS-DOS 6.22 VDI from an archive (e.g., Internet Archive). Then simply attach it as a primary hard disk. This avoids IMG files entirely for the OS, though you’ll still need IMG files to install software.
If you want to optimize your classic environment further, let me know: Do you need to install or mouse drivers ? ms dos 622 img files works with virtual box top
Look at your Storage Devices tree. If a Floppy controller is not present, click the icon at the bottom of the tree and select I82078 (Floppy) . If you don’t care about the installation process,