Step 1: Sign into your account via https://portal.office.com/
Step 2: Navigate to Power Automate or open https://flow.microsoft.com/
Step 3: Click on Create on the left pane.
Step 4: Select Scheduled Cloud Flow option.
Step 5: Enter the start date and time and the frequency and click on Create button.
Step 6: Click Next step button and click on Mail and then select Delete file under OneDrive section.
Step 7: Choose the file to be deleted.
Step 8: Click Save.