You could adapt my Excel export script to output HTML instead of XLS.

I am looking into info-beamer's screenshot utility. While it does not support width and height it seems to have a better performance at larger resolutions.

Based on what I have read, it seems to support full "streaming" instead of just grabbing screenshots every few seconds, but I haven't figured that part out yet.

@exarkuniv Thank you! It works.
I have changed php version 7.1 to 7.4 in INSTALL.sh
Thank you!

@steptoe are you talking about the RetroPie-Manager?

If yes, be aware that the tool is made to manage ROMs only in the usual paths (which is ~/RetroPie/roms and ~/RetroPie/BIOS). If you want to make the tool point to the external USB drive my suggestion is to create symbolic links.

Maybe something like this:

ln -s path/to/roms/dir/on/your/usb/drive ~/RetroPie/roms ln -s path/to/BIOS/dir/on/your/usb/drive ~/RetroPie/BIOS