boot.
What is the significance?
It looks like fossapup is just deciding on its own to load random savefiles, and the one it chose happens to be on a FAT32 drive. In the boot menu I chose to boot from /mnt/nvme0n1p4, but fossapup is loading a file from /mnt/nvme0n1p3.
I want to be able to save my settings and configuration which I can use on the next boot. And I want to choose which savefile to use on each boot.