Step 1: Tap Select Select files , then select the file or files you want to delete.
Note: You can only delete 200 files at a time. If you need to delete more than 200 files at once, go to OneDrive.com.
Step 2: Tap Delete Delete icon for OneDrive for Windows 10 mobile .
Step 3: When asked to confirm your deletion, select Delete.
Step 4: Tap Delete OneDrive delete file to remove the files permanently.