Arrow Up or Arrow down - a poll, for science

I'm having a discussion with a friend: He's got a script in which you need to click a 'up arrow' to import and a 'down arrow' to export - which is very confusing to me ever since I'm using his script.
So today I finally asked him if this was just an accidental mix-up of icons or what's going on since I only know it the other way around for the last 25 years since I'm using PCs.

In short his reply was:
"Import -> Send the data -> Upload it -> Arrow up"
"Export -> Get the data -> Download it -> Arrow down"
which is completely mind bending to me.

For me it always was:
"Import -> Get the data -> Download it -> Arrow down"
"Export -> Send the data -> Upload it -> Arrow up"

So, what do you think?