Cross post
Okay, when you’re having issues with an SD card not formatting, I always try the following steps first. Open powershell or cmd prompt in admin mode then try:
diskpart
list disk
select disk
clean
create partition primary
format quick
Then give it another go. This will often resurrect dead drives/cards/USB sticks or reset them back to their old capacity when it displays wrong.
Are there even any “next steps” after doing this?
I don’t mean to sound contrary! I’m genuinely curious. Because it seems like diskpart is a pretty low level tool, so if this trick fails, I’m wondering have you pretty much eliminated software related causes?
There may be using a card/drive manufacturers utility but I’m not sure beyond that. I’ll usually abandon a drive or card if this doesn’t work. With that said, someone smarter than me may have some other suggestions (linux-based?) using gparted or another tool.
I would try again with another SD card, if I had one.