is PLA food safe?
technically, yes, but the danger lies more in that food can get stuck between layer lines and develop naughty bacteria
This guy on YouTube explains it great
is nextcloud still the best to host a small amount of files that need to be accessible anywhere and backed up? and carddav caldav
There is a bunch of ways to do that, I'd say nextcloud is good if you want to have a multi-device system with syncing and convenience tools