Sync your OneDrive for Business files
Sign in to Office 365 or your organization's SharePoint site with your work or school account.
Select OneDrive at the top of the page. Or, select the app launcher , and then select OneDrive.
Select the Sync button.
NOTE: If you don’t see a Sync button, select the Library tab and then select Sync in the Connect & Exportgroup. (You may need to click Settings)
At the prompt, click Sync Now to start the sync app wizard. The wizard automatically fills in the name and web address of your OneDrive.
Select Sync Now in the wizard to start syncing.
You can click Show my files… in the wizard to open your OneDrive folder in File Explorer. The folder is listed in your Favorites as either OneDrive - CompanyName or as OneDrive @ CompanyName.
You might see this in File Explorer...
When you're opening or saving an Office document, your screen looks similar to this: