I think this might be because it is an iso9660 formatted live image as i have def formatted lots of other usb drives as ext4 and then DD’d other live distro’s to them and they have stayed ext4 after the DD finished - and they’ve booted. Although i think i might have seen other distro’s overwrite the usb drives formatting … i guess i must have ignored it though.
Or maybe it’s “the way” (as someone mentioned in an earlier post) that the live image was created - i REALLY don’t know enough (anything!) about making live images.
I do realise that there is no need to format before the DD.
However, a long time ago, with another distro, i noticed that the live usb produced by the dd was fat (of some flavour). As i mentioned, i would prefer, feel a little safer, if a casual Windoze user “saw” anything of mine as unreadable, so i tried formatting the usb drive before the dd and was delighted when the resulting live drive booted and yet was still ext[whatever i had used]. And i’ve done the same ever since. I’ve got and old copy of knoppix (pre P–T extinction i think) you can try it on that if you want. That’s the oldest distro i retain & TBH i did make that iso myself from an old CD (yes, all 699Meg of it) so it might not be a good test subject.
@ricklinux i didn’t have a “problem”. I just noticed that the formatting had changed. Obv for anyone who doesn’t care about what format it is then they should def not be formatting before they DD as DD can, i understand, handle most issues it might come across with a pen drive.