When it comes to your company's data, nothing is more valuable, yet often it is taken for granted. Taken for granted, that is, until a hard disk fails. Many companies set up a simple policy to mirror their data on an external drive every night. This works great until the wrong file gets published, and then nobody knows which version should be on the server, and the backup already mirrored the incorrect one. I've even seen companies who just hope that "somebody has a copy" and ignores the idea of backups until something heavily breaks.