This guide will show you how to create an S3 bucket on AWS. You can also directly refer to the Create your first S3 bucket - Amazon Simple Storage Service
The bucket name must be unique within a partition. A partition is a grouping of Regions. AWS currently has three partitions: aws (Standard Regions), aws-cn (China Regions), and aws-us-gov (AWS GovCloud (US) Regions).
Bucket name must be unique within the global namespace and follow the bucket naming rules. See rules for bucket naming
Note: The bucket name cannot include uppercase letters.
First, you need an EC2 instance configured with permissions to access your AWS resources, particularly the permission to create an S3 bucket.
Note: The must also be unique across the entire AWS region. Recommended format: -s3-, such as: montcache-s3-us-east-1.