Different backup media types have different capacity and characteristics. Such as external hard drives, USB storage, that provide large capacity and mobility. User can copy file as backup easily. To prevent data lose from missing the media, encryption or password can be deploy. Network Attached Storage integrate high speed, large storage and flexibility for storing virtual machine or system image backup. Advance Backup model such as incremental or differential backup can improve the possibility of data restore. New cloud storage space, easy to achieve offsite backup. Backup set store to other places, and no interconnection with internal network. Effectively prevent data lost from physical server issue or office location.