It supports backing data to Amazon S3, Google Cloud, Azure, Rackspace, Google Drive, OneDrive, Dropbox, FTP/SFTP, and local drives. It backs up VMware virtual machines, MySQL and files to Amazon S3, Google Cloud, Dropbox, FTP, and local drives.
Newsarea - Areca Amazon S3 Plugin v.3.1.3.rc Amazon S3 plugin to backup files with Areca to an amazon s3.
It support S3 REST API, MD5 digest, ACL and large uploads.