Client Computer Backup and NAS Storage Server based on Windows Storage Server 2008 R2 Essentials (WSSe) and HP Microserver. This server enables you to backup up to 25 computers on a daily base using a VSS snapshoot triggered image based backup that deduplicates the computers data across all backed up computers. In other words Backups of common files and folders like the WINDOWS folder will only get backed up once to the server and all later computer backups will point to that instead of copying another instance of that files to the server. Because our server is based on the HP Microserver SKUs you can order a base model of the HP Microserver server including a preinstalled version of Windows Storage Server 2008 R2 at our store and then opt up the base model with any HP Option you like. The point is that you currently can not buy the HP Microserver from HP with Storage Server Essentials preinstalled or as a ROK or someting, so we toke care of that and offer you to buy that bundle of HPs Microserver and a preinstalled copy of WSSe from us. You can reinstall and add options to that server after purchase as you like. Learn more about the hp Microserver hardware in this video from the hp and MS Cofeecoaching site....