Access One Bucket Policy

access.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListAllMyBuckets"
            ],
            "Resource": "arn:aws:s3:::*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:*"
            ],
            "Resource": [
                "arn:aws:s3:::YOUR_BUCKET_NAME_HERE",
                "arn:aws:s3:::YOUR_BUCKET_NAME_HERE/*"
            ]
        }
    ]
}