You can delete files/attachments after successful migration. Follow these steps:

  • Navigate to the Mass File Migrate app and select the "Mass File Migrate" tab.
  • In the "Select File/Attachment" dropdown, choose a file or attachment according to your requirement.
  • Select the object from which you want to migrate files/attachments
  • Turn ON the Toggle  "Delete Files after Upload".
  •  Click on the "Search" button.
  • A table will render with all files related to the selected object.
  • If you want to migrate all files, simply click on "Migrate All".
  • If you want to migrate only selected files, click on the "Migrate Selected" button.

Upon successful migration, you will receive a success message on the screen, and the file/attachment will be deleted from the source org.


PS: View Mass File Migrate Salesforce file migration app on Salesforce AppExchange:

https://appexchange.salesforce.com/appxListingDetail?listingId=e9874a66-2001-4e3d-8a29-3a2ed7f584c4