Export the created AMI image to an AWS S3 bucket is not permited, but it is free software

Hello. The error is not tied to your image, but to the destination bucket. You need to check the S3Bucket:

1. Is a bucket that exists and that you have access to read and write. Remember that bucket names are global, so perhaps "ami-export" does exists, but is owned by other account.
2. When you know you can manage permissions for the bucket, check as suggested in documentation here.

My suggestion is to create a new bucket for this process so you can configure permissions, encription and version control as you need.

Hope this helps.

Mauricio.

I named bucket I created ami-export3, but I dont cant change permissions.

To assign permisions to the user that is executing the export you can follow this walkthrough. This explain process from bucket creation.