I just had a look at their page. Their S3 is different from Amazon. In AWS, it is global - they synchronize the objects between locations which menas it's eventually consistent but it has amazing SLA. Whereas Hetzner clearly states: "Currently, Object Storage is available in the following locations: Falkenstein, DE (FSN1), Helsinki, FI (HEL1), and Nuremberg, DE (NBG1)." So if I wanted HA, I'd use two locations or more.