OneDrive needs to be able to upload files with special characters such as parentheses
Onedrive can't sync a file if its name contains any parentheses (), which is really problematic because some programs create temporary project files automatically containing these characters. I can't use OneDrive to backup my Ableton Live music projects because it won't upload these auto generated project files. Renaming them manually is a huge hassle because I'll have to go back to the program and relink them all, and there can be many.
I know others using Ableton has switched from OneDrive to Dropbox over this issue.