Amazon S3 Storage with PSS

Hi all - I am looking at the external storage of files with Amazon S3 with PSS solution. A few (kind of general) questions:

1. Has anyone implemented this before and have any lessons learned or limitations?
2. Is it required to have Files Connect licensing on top of PSS? Or is this feature included in PSS Foundation licenses?
3. Has anyone used this in an experience cloud site before where community users are uploading files to S3?

Appreciate any insights! Thanks!