I would think you could set up a migration process where existing things are loaded off of S3, and as soon as you make any changes, you save it to $NEW_STORAGE

I would think you could set up a migration process where existing things are loaded off of S3, and as soon as you make any changes, you save it to $NEW_STORAGE and delete it off of S3. Eliminates the need to egress anything, lowers your S3 bill over time, and as a user it'd be pretty hard to log in after a year and be upset that your FB cover image is no longer there, especially on the free tier.