The following folder names can be synchronized in One Drive for Business and SharePoint On-line. Additionally, a folder that contains the string _vti_ is reserved by SharePoint, and isnвЂ™t supported. This occurs because вЂњformsвЂќ is a hidden default folder thatвЂ™s used to store templates and forms for the library. Unsupported folder names:В When you sync One Drive for Business with SharePoint Online or SharePoint 2013, a folder named вЂњformsвЂќ isnвЂ™t supported at the root level for a list or library. The following characters in file or folder names arenвЂ™t supported when you sync OneDrive for Business with SharePoint On line:ДЄdditionally, a file or folder name that begins with a tilde (~) isnвЂ™t supported.ДҐ. Folder name and file name combinations can have up to 250 characters. Folder names can have up to 250 characters. In SharePoint On line, file names can have up to 256 characters. In SharePoint Server 2013, file names can have up to 128 characters.

Character limit for files and folders: These limits apply to files and folders that you add to a synced library folder for uploading to SharePoint.

Size limit for syncing files:В In any SharePoint library, you can sync files of up to 2 gigabytes (GB).

Any team sites that you sync will also count against the overall 20,000 item limit across all synchronized libraries. You can sync multiple SharePoint libraries. These are libraries that you find on various SharePoint sites, such as team sites and community sites, libraries that other people created, or that you created from your Sites page. This includes folders and files.You can sync up to 5,000 items in a SharePoint library. Separately from the overall sync limit, there are limits to the number of items that can be synchronized for each library type.You can sync up to 20,000 items in an One Drive for Business library. This includes One Drive for Business libraries, Team Site libraries, or both. Number of items that can be synced:В You can sync up to 20,000 items total across all synchronized libraries.

Onenote file size limitation