- Files upload using this app are not stored in Salesforce, they are stored in the AWS S3 bucket defined by the user at the time of configuring the app.
- Only Cloud Document records are created in Salesforce, containing reference information about the file and a link to access the file.
- You can access the Cloud Documents records from the related list of the object you used to upload files, as shown in the image below.

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