Before I go ahead and do it, is there an image that installs to an internal drive, you know like Ubuntu… a live USB that installs locally, permanently?
The way I see it at the moment, is to remove the drive I want to install to, flash it with dietpi, reinstall and boot.
The UEFI image allows to be installed on internal drives and we aim to ship such installer images for BIOS systems as well soon and other SBCs which have an internal eMMC.