Backup Vsphere ESXi and Windows 2008 r2

Hi all,

I have a Virtual Server Esxi installed on HP ProLiant SAS disk array. And on the Virtual environment I have windows 2008 R2 installed and running, At the moment I'm just doing a simple Windows Server FULL backup to an external HDD but not a Vsphere backup. Could you offer some solution how better to do a full backup on this environment that I'm using ?