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The incremental backup profile comes with a disadvantage: you have to restore all incremental backups taken after the last full site backup. The usual process is like this:
- Upload Kickstart, a full site backup and all incremental backups taken after the full site backup
- Run Kickstart and extract the full site backup. Do not run the installer.
- Run Kickstart again and extract the first incremental backup.
- Run Kickstart again and extract the second incremental backup.
- ....
- Finally, visit http://www.example.com/installation/index.php to perform the actual restoration

Incremental backups is a very advance feature. If you are not sure how to handle it, the chances are that you don't really need it.

I don't understand what "restore a JPA on amazon" means. You can't restore a backup on Amazon S3. You can fetch a backup from S3 and restore it on a server. If you mean a server running on Amazon EC2, as long as it has a web server and can run Joomla!, any server will do, no matter where it's located.

I have no idea what you're asking with "I find how to backup but an restore plan i do not find?". If you mean that the documentation does not give detailed instructions on how your backup plan should be, that's right. If there was an one-size-fits-all approach to backups, I'd have to do no support and I'd have at least 5 hours of spare time every day. Unfortunately, that's not the case. You are responsible to decide what is the best backup plan for your site. I can't take that decision for you :)

The typical backup plan is to create full site backups once or twice every day. Taking and restoring full site backups is covered in our User's Guide, our Quick Start Guide and our Video tutorials.