fos (save files in C:\Users*user\Documents\My Games\Fallout4\Saves)Ģ) solution, which worked for me (chronologically) save files were suddenly saved as *.fos.tmp instead of *.f4se and.Suddenly without any change in the game or Nexus, the game was crashing to desktop without any information during saving.Game was modded (> 80 mods), but with fully functional saving system.
Happend to me as well - solution which worked for me is below.