htc 816 official firmware and custom firmware failed-help me to use ota or nandroid

[zone3]

htc 816 tried official and custom files-not success-details in below link

http://forum.gsmhosting.com/vbb/f485...-help-2112673/

i have experince in using official and custom firmwares only-did not use nandroid backup and ota files-my phone details as below

C:\android>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.31.50.0215
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: FA46PMZ03095
(bootloader) imei: 352795061188495
(bootloader) imei2: 352795061188503
(bootloader) meid: A1000037CF562C
(bootloader) product: a5_dwg
(bootloader) platform: hTCBmsm8226
(bootloader) modelid: 0P9C51000
(bootloader) cidnum: HTC__038
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 09813c97
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
Execution time is 31(ms)

i have below files for nandroid and ota





first time go to do nandroid backup or ota

which file in above select ?

need procedure also

thanks