The quote in the thread title comes from the official FileMaker page http://www.filemaker.com/products/filemaker-server/whats-new.html
The complete quote states:
"FileMaker Server 13 lets you back up databases separately from container field data. Store your container field files on a separate remote drive from the actual database, and make scheduled back ups even faster. " [bold is mine]
Problem is: am I missing something, or storing container field files on separate remote drives is in fact NOT possible with FM Server 13? I'm sure FM people told me it was possible, during a pre-release presentation of version 13, last year - and I strongly suggested my clients to upgrade to FM 13 just for that reason...