S3: make a public folder private again?

Question

How do you make an AWS S3 public folder private again?

I was testing out some staging data, so I made the entire folder public within a bucket. I\'d like to restrict it

Answer 1

It looks like that this is now addressed by Amazon:

Selecting the following checkbox makes the bucket and its contents private again:

Block public and cross-account access if bucket has public policies

https://aws.amazon.com/blogs/aws/amazon-s3-block-public-access-another-layer-of-protection-for-your-accounts-and-buckets/