OneDrive chokes when used for code backup. It cannot handle all the intermediate and output files created by build processes. It just stops syncing, never completing its "scanning for changes... " routine. This is with the pro plan (1 TB). Happened to me twice. Took an act of congress to get sync working again. Now I use git repos outside OneDrive for all my code storage and all is well. For OS and app backup I use Acronis True Image. Fast, flexible, reliable, but not cheap. Then again, what would you give in an emergency to get your data back?