GoodSync will backup and sync your files between your computer, mobile device, or drive without any need for the cloud.

GoodSync is designed to back up your computer in numerous ways. It not only syncs files between your computer and mobile devices but also between FTP, Amazon S3, Google Drive, Azure, and others. It can also backup files to portable drives as well as other computers.

GoodSync uses 3rd party servers to back up your files as needed. You can sync files on command, or by a schedule and even in real-time when a file's details change, and it can also protect your important files including photos, financial documents, MP3s, and even e-mails.

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Version History for GoodSync:
http://www.goodsync.com/download/news-windows

Limitations:
There are a number of features included with the free version including backup & synchronizations of jobs (3 job/100 file limit), cloud service support, end-to-end encryption, FTP/SFTP/WebDAV among a few others. Prices start at $49.95 additionally providing:

Unlimited job & files

GoodSync Connect

Mobile device support

GoodSync job automation

Unattended job service

Premium technical support