Microsoft SyncToy enables you to backup and synchronize your files and folders between two locations on a local or removable drive. It offers an easy to use step-by-step interface as well as advanced options that allow you to set file filters, include or exclude sub-folders and more. The program supports true synchronization (two-way) as well as Echo and Contribute which are more intended for backup purposes. You can preview the entire operation with all actions to be taken before any files are processed. Other features include command-line options and scheduling (via Task Manager).

Features:
1. Dynamic Drive Letter Assignment: Drive letter reassignment will now be detected and updated in the folder pair definition.
2. True Folder Sync: Folder creates, renames and deletes are now synchronized for all SyncToy actions.
3. Exclusion Filtering Based on Name: File exclusion based on name with exact or fuzzy matching.
4. Filtering Based on File Attributes: The ability to exclude files based on one or more file attributes (Read-Only, System, Hidden).
5. Unattended Folder Pair Execution: Addressed issues related to running scheduled folder pairs while logged off.
6. Folder Pairs With Shared Endpoints: Ability for folder pairs associated with the same or different instances of SyncToy to share end-points.
7. Command line enhancements: Added the ability to manage folder pairs via the command line interface.
8. The SyncToy engine has been rearchitected to provide scalability and the ability to add significant enhancements in future releases.
9. Sync engine is also more robust insomuch that many single, file level errors are skipped without affecting the entire sync operation.
10. Sync Encrypted Files: Sync of Encrypted files works when local folder and files are encrypted, which addresses the common scenario involving sync between local, encrypted laptop PC folder and remote, unencrypted desktop PC folder.
11. 64-Bit compatibility
12. Folder pair rename
13. Sub-folder Exclusion Enhancements: Descendents creates under excluded sub-folders are automatically excluded.
14. Folder Pair Metadata Moved: Folder pair metadata removed from MyDocuments to resolve any issues with server-based folder pair re-direction setup.
15. Removed combine and subscribe actions.

The license of this software is Freeware, you can free download and free use this file sync software.