

The few things I needed repaired on my model 3 was just fixed by my local mechanic, who also did the yearly brake-maintenance. Once I bought original parts from Tesla and had my own mechanic change it, but they’ve also used 3rd party unoriginal parts they sourced themselves without issues.
I don’t know which model your neighbor has, but for model 3 at least there are lights from 3rd party manufacturers available.




The key here being that you actually remember the file exists, because it’s important. Some other random spreadsheet you don’t even remember exists because you haven’t needed it since forever is probably not all that important to backup.
If you loose something without ever realizing you lost it, it was not important so there would be no reason to make a backup.