There are a number of strategies for protecting data. Vaulting, where data is kept backed up off-site, is one of the best. At the very minimum, some sort of redundancy is required.
I've been testing AllwaySync to keep a mobile laptop synchronized with the files I'm working with on the office network, to both keep files current and to protect the hard work I have put into creating them. The program works as advertised and it is fairly easy to set up. Just tell the program the folder on the local and remote computers to keep synchronized, analyze the folders, tell the program how to resolve conflicts, and sync. The program has an option to do a scheduled sync but I have yet to test it.