Yes.
The email includes the Delete Files After Upload value so you can verify if files were supposed to be removed from Salesforce after migration. 
PS: View Drag, Drop & Upload Files to Amazon S3, a Salesforce AppExchange app for moving files from Salesforce to Amazon S3: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3000000B5ZPqEAN