Allway Sync can also function as a back-up and restore application. Additionally, it comes with other powerful features like the ability to remember the prior state of directories, hence can synchronize deletions. Ability to synchronize two or more directories at once. Plus, supports a variety of file systems including SAMBA, FAT, NetWare, UDF, NTFS, CDFS, X-Drive, and many more.
Allway Sync offers a free version (for personal use only) but it has limitations. You have the option of upgrading (for a fee) to the pro version. It also offers business licenses.