Using a Windows computer, follow the instructions to Sync your OneDrive to your Windows computer unless you already have these files synchronized to your C: drive.
How to Download Your Files Using Windows Alternative 1: With Sync If you do not already Sync your OneDrive to your Windows computer, then follow the instructions to Sync your OneDrive files and prepare to give that process time to complete. You just want to verify that all files are up to date and have no sync errors as described in these instructions.
Upload the files to a new Cloud service like Office 365 for consumers, a free Microsoft OneDrive account, Dropbox, Google Drive, etc.The following steps will help you move your OneDrive for Business files to a personal external hard drive or to another Cloud-based storage service. This is a manual process that involves two steps: Anyone you have shared these files with will no longer be able to access them once they are deleted.
Because OneDrive for Business is part of Office 365, those files will be deleted as well. If you are leaving Western, your Office 365 account will expire.