cheapest price ever - only £15 quid more than the 2 bay
not sure how to add screen shot but link to camelcamelhttp://uk.camelcamelcamel.com/Netgear-ReadyNAS-Network-Attached-Storage/product/B00BJ1BGB6?context=browse
ReadyNAS Four-Bay, Diskless Network Attached Storage (NAS) -- RN10400
Photographs, video clips, songs, websites and text messages -- the types of data that enrich our lives can seem endless. With ReadyNAS you have an easy way to centralise, access and share your digital world. More than storage for all your stuff, ReadyNAS features protection of your files, the ability to manage stored data from any web-enabled device and a library of add-ons that allow you to do more with your storage. Every networked attached storage (NAS) device from NetGear runs on the revolutionary ReadyNAS operating system.
Designed with ease-of-use in mind, devices are discovered automatically through the cloud and feature a sleek, modern interface. Also, stored data is protected not only with automatic RAID configuration, but this ReadyNAS offers home users the continuous data protection of unlimited snapshots along with real-time anti-virus and native encryption. ReadyNAS also features remote access innovations, cloud-based file synchronisation (ReadyDROP) and the ability to back-up data from your Mac anywhere in the world with Apple Time Machine (for Mac OS X compatibility issues and best practices, see link below *).
Your data is your world. With ReadyNAS, protecting and accessing that world is easy.