InSync is a powerful file backup and synchronisation tool with many different configuration options.
The program is particularly easy to use. You can choose the file transfer type (backup, mirror or two-way synchronisation), your source and destination folders, and add file include and exclude filters all from the same dialog box. It's possible to create multiple synchronisation jobs, and then run any or all of them simultaneously.
InSync is optimised for performance, too. The ability to copy only new or changed files, for instance, will save you a great deal of time. And the native 64-bit version will deliver the best speeds on 64-bit Windows. (The single installer contains both 32 and 64-bit versions of the software, and installs the one appropriate for your PC.)
And whichever version you use, you'll appreciate the many advanced features that ensure each InSync job delivers the results you expect. The program supports international character sets in folder and file names, for instance; path names that exceed the usual 260-character limit; can back up locked files; is able to use volume names rather than drive letters for plug and play storage; and even preserves NTFS permissions, ownership and group information.
It's not cheap, but InSync is an excellent synchronisation and backup tool with many thoughtful features