Which region should I enter for my Amazon S3 account?
Short answer: Enter the region your bucket was created in, such as eu-west-2. The Amazon preset starts with us-east-1, so change it if needed. The S3 console's bucket list shows each bucket's region.
Enter the region your bucket was created in — for example eu-west-2 or ap-south-1. The Amazon Web Services preset fills in us-east-1, so change it if your bucket lives elsewhere.
You can see a bucket's region in the S3 console's bucket list. When creating a new bucket, pick the region closest to you for better speed. Don't paste an Availability Zone ID — see invalid region.