I was tired and distracted and made a mistake withno consequence.
I’ve never had any 230v electronics before and I received an external hard drive that I knew had a 230v power supply. And without thinking I plugged it into 110v and it worked fine.
After realizing my error I opened the power supply and found that it had a wire that you could change connections for 110v which I did.
Good thing I'm not in a position to do it the other way around.