
Office 365 subscribers using OneDrive for Business will generally use the " new" Sync Client, but to sync SharePoint files you must use the " previous" Sync Client. There are two different sync clients in use with OneDrive for Business the " new" or " next generation" OneDrive for Business Sync Client, and the " previous" OneDrive for Business Sync Client.

OneDrive uses a sync client to achieve synchronisation. Whenever you're online, any changes that you or others made while offline will sync automatically. To work with files from SharePoint site libraries directly in File Explorer, and access the files even when you're offline, you can sync the files to your computer using OneDrive for Business. Syncing SharePoint files using OneDrive for Business
