On behalf of a customer, I recently had the task of transferring an S3 bucket for a Mastodon instance from a self-hosted Minio instance to Hetzner S3. I would like to explain the procedure and the configurations I used here.
Since the user flood of November 2022 I’ve been using Scaleway’s S3 storage for media file caching and storage of my metalhead.club Mastodon instance. It was easy to set up and has been working reliably for me. Back then the media cache size increased so much that my server’s internal storage could not keep up with the increasing demand. I didn’t want to shrink down the cache duration too much and therefore left it at 14 days. At the time, the cache was about 800 GB in size - a big mass of image files that could not be handled by my aged server itself.