You can use cp to copy the files from an s3 bucket to your local system. Use the following command:
$ aws s3 cp s3://bucket/folder/file.txt .
To know more about AWS S3 and its features in detail check this out!
https://www.youtube.com/watch?v=XjPUyGKRjZs
You can even go through the AWS training to learn all about AWS S3, EC2, VPS, and more.
Hope this helps!