Archintstall sometimes produces problems(at least I had problems with it). Make sure that you have the current iso version of arch on your stick and try again.
It should work with both ways. First time I did them with archinstall(but didn’t like that it created a separate partition for my home directory). Second time I manually partitioned my drive and then let archintstall use that.
I live on the edge (lemmy.world)
Based KDE 🗿 (lemmy.ml)
Just install EndeavorOS lol (feddit.de)
stolen from linux memes at Deltachat