Amazon S3 is an object store. Objects (files) are stored as simple key-value pairs within containers called buckets. Bucket names have to be unique across AWS. There is no folder hierarchy within the buckets like traditional file systems. However, we can simulate folder structure with hierarchical key names. For example, consider the folder1/folder2/file.txt key, that simulates a folder-like structure. Read more about simulating folders in S3 at https://docs.aws.amazon.com/AmazonS3/latest/user-guide/using-folders.html.