Altium
Not using Altium, but learning to understand how the files are organized.
Migrating from Altium to KiCad https://www.youtube.com/watch?v=UouWuxlt9Uk
- PcbLib → PCB footprint library
- SchLib → Schematic library (symbol library)
- Footprint library?
- .SchDoc → contains the schematic files
- .PcbDoc → contains the pcb files