Qplus tv box, image repack and edit quetiosn

[sc20ka]

good day

im so new in this and wanna afk u for this starting quetsions

i have tv box "Qplus" with arm allwinner H6 4 gb ram memory and 32 nand 

from this post

 https://forum.armbian.com/topic/12162-single-armbian-image-for-rk-aml-aw/

 

i get .img file and just transfer to sdcard 

if im try to use file some_name.img im get "data" type

and if try to mount get error

 

if just install sdcard in tv box im see they launching but asking me about login and password

 

i wanna edit and adding some other setting and pack's

 

and i have queston how to edit, how to see, how to unpack and repack what this

im fink it a like a normaly ext4 with some scripts for ARM MCU to normaly correctly launch with this file 

thanks