FreeFileSync is a folder comparison and synchronization software that creates and manages backup copies of all your important files. Instead of copying every file every time, FreeFileSync determines the differences between a source and a target folder and transfers only the minimum amount of data needed.

Zero trust, fully encrypted backup.

Pick your own backend and store encrypted backups of your files anywhere on or offline. For MacOS, Windows and Linux.

Works seamlessly with your storage providers.

Backup files and folders with your favourite applications. Duplicati works with standard protocols like FTP, SSH, and WebDAV, as well as a wide range of popular services:

-Amazon S3
Provides object storage through a web service interface.

• Azure Blob Storage
  Optimize costs with tiered storage for your long-term data.

• Backblaze
  Encrypted data that's accessible only by the account owner.

• Box.com
  Cloud-based, collaboration, and file sharing tools for businesses

• Cloudfiles
  Web-service that provides secure file sharing for business.

• Dropbox
  Cloud storage solution, with features to help you save time.

• External Hard Drive
  Create backups on your own external hard drive at home

• FTP Server
  Connect to your own FTP server and use it for backups

• Google Cloud
  A managed service for storing unstructured data.

• Idrive e2
  Scalable and durable cloud-object storage platform.

• Jottacloud
  Innovative & secure cloud storage for private and business use.

• Mega
  User-controlled encrypted cloud storage with web access.

• Microsoft Sharepoint
  Cloud-based service offered as part of the Microsoft 365 suite.

• One Drive
  OneDrive is Microsofts solution for online personal storage.

• Network-attached Storage
  Connect to your own NAS server at home to be safe and secure

• SFTP Server
  Connectivity tool for remote login with the SSH protocol.

• OpenStack
  Clusters of standardized servers to store petabytes of data.

• RClone
  A command-line program to manage files on cloud storage.

• Sia
  An end-to-end encrypted file sharing software.

• Storj
  Store data securely on thousands of nodes worldwide.

• TahoeLAFS
  Free and Open decentralized cloud storage system.