WSS FAQ How to restore WSS/WSSE backup
1.
According from Microsoft follwoing link, it is need WSS/WSSE installation media:
Restore or repair your server running Windows Server Essentials
https://technet.microsoft.com/en-us/library/jj593197(v=ws.11).aspx#BKMK_Restore
2.
Following WSS/WSSE installation media link for your reference:
*How to make ISO to bootable DVD(Recommend choose dual layer DVD disk)
http://www.imgburn.com/
*How to make ISO to bootable USB(Recommend use 8GB or above USB disk)
http://www.imgburn.com/
*How to configure NAS boot from DVD or USB driver
http://thecus.kayako.com/default_import/Knowledgebase/Article/View/574/0/how-to-configure-nas-boot-from-dvd-or-usb-driver
WSS/WSSE isntallation ISO
https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-2012-r2
or
https://www.dropbox.com/s/0jtwnlml2iqnyz6/9600.16384.WINBLUE_RTM.130821-1623_X64FRE_SERVER_SOLUTION_EN-US-IRM_SSSO_X64FRE_EN-US_DV5.ISO?dl=0