For quick reference, you may need to create a policy for an AWS IAM user to only access one specific bucket, ‘BUCKET_NAME_HERE‘.
{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "s3:ListBucket" ], "Resource": [ "arn:aws:s3:::BUCKET_NAME_HERE" ] }, { "Effect": "Allow", "Action": [ "s3:PutObject", "s3:GetObject", "s3:DeleteObject" ], "Resource": [ "arn:aws:s3:::BUCKET_NAME_HERE/*" ] } ] }