So the movie Civil War (2024) became a reality

sudo mkdir /media/NewSSD # the name you like
lsblk -f # look for UUID of new ssd

then add it to fstab https://wiki.archlinux.org/title/Fstab

Something like

UUID=<insert drive UUID> /media/NewSSD ext4 defaults 0 2

Make sure you use the correct filesystem (e.g. ext4 or other)

This.
“Just do a quick update” and spend 1h trying to fix some broken updates

Also look at https://archlinux.org/news/ before updating (or follow the RSS feed), some updates may need manual intervention