I’m sorry
im Getting confused.
please remember that we, as readers, don’t necessarily know by instinct to what you’re exactly referring when you say “this” or “the ones before”.
when possible be specific to what you’re referencing, an old 360k disc that is probably 40yo or a known to be working 720k disc.
also, if you really have a single sided drive, my memory says that the dual sided option to format shouldn’t even appear as an option…. 🤷♂️
should be greyed out at least
in your photo of the drive I didn’t see a label with model number.
my steps would be to take a KNOWN to work 720k disc, format it on PC internal drive (not USB) using the proper command, copy a text file to the disc and try
you can also image an empty 360k floppy on steem and copy sysinfo