Step 1: Sign in to OneDrive on your browser with your Microsoft personal account.
Step 2: On the left navigation pane, under OneDrive, select Shared. Files and folders that you can add to your OneDrive are marked Can edit.
Step 3: Locate the folder you want to add, select the circle in the folder’s tile, and then select Add to my OneDrive on the top menu. Or right-click a folder and select Add to my OneDrive.