A Microsoft file hosting and synchronization service.
FYI, the app again went on full throttle on me for 30 mins... processing "300" changes... I didn't even know I had that many files or processes going on! The folder OneDrive syncs has only data files and I have 4-5 of the files open... FIX IT PLEASE
That's exactly what it does to me and everyone I know that uses OneDrive. My only saving grace is this new MacBook M1. It has no issues gobbling up the wasted CPU cycles.