Onedrive file name restrictions

1. What file names are not allowed on OneDrive?
2. Why can't I Rename a file in OneDrive?
3. Why is my file name limited?

What file names are not allowed on OneDrive?

These names aren't allowed for files or folders: . lock, CON, PRN, AUX, NUL, COM0 - COM9, LPT0 - LPT9, _vti_, desktop. ini, any filename starting with ~$.

Why can't I Rename a file in OneDrive?

If you cannot rename it, the file is still in use. Restart your computer and try again. Move the file to a folder not within your OneDrive.

Why is my file name limited?

Windows can handle file names of up to 260 characters in length, including the path to the file. If a file is nested within many folders, and/or if the file has a long name, the character limit is most likely exceeded.