Hi Kendra,
From your post, we understand you want to find the full path of the file stored in SharePoint online/ OneDrive for business synced to your local computer.
To find the path, open any Office file from the synced folder in File Explorer, let’s say you open an Excel workbook. Once the workbook is opened, click File>info>Copy path and paste this path to a notepad. Alternatively, you can click File>Home, under Recent list, find the file you want the path for, right click on it and click Copy path to clipboard from the context menu.
If you need further help, let us know. Have a nice day and stay safe😊
Regards,
Neha