Second Copy® is the perfect backup product designed for Windows 9x/Me/NT4/2000/XP/2003/Vista you have been looking for. It makes a backup of your data files to another directory, disk or computer across the network. It then monitors the source files and keeps the backup updated with new or changed files. It runs in the background with no user interaction. So, once it is set up you always have a backup of your data somewhere else.

Highlights
Windows Vista compatible

Windows XP style user interface
Up to 256-bit AES encryption

Two-way Synchronization
FTP support

Automatic detection/deletion during synchronization
Enhanced compression

Automatic scheduled copies