The files on your OneDrive are private until you share them. Keep in mind that when you share folders with Edit permissions, people you share with can add the shared folders to their own OneDrive. This lets them keep the folder alongside their own folders and items, easily move items between folders, and more easily work on it offline. Any updates they make sync with the shared folder, so everyone with access to the folder is up to date.
With a file open or a file or folder selected, select Share.
If you are working on your desktop and the file hasn’t been saved to OneDrive or SharePoint, select a location you want to upload your file.
Select the down arrow to choose permissions for the link you will be sharing. Options include:
Anyone (access expires in 30 days)
People in your organization
Specific people
Select Apply to save the permissions.
Enter the name or email address of people you want to share with.
Type a message.
Select Send.
Or, you can select Copy Link and send the link in an email or add it to a file.