How to read and farmet qmobile l7 spd sc6531

first
open volcano tool v3.0.9
select spd from left side of volcano tool
now
select boot sc6531
check ot tick on read flash
now uncheck auto-detect piouts
now
open battery press and hold home or center button
insert cable and immediately insert battery
cell connected...
after click on run button
do not release home button,
read start now release home button....

(Internal version: SPRD3
  Boot downloaded.
  Start boot please wait a moment....
  Spreadtrum Boot Block version 1.2
  CPU TYPE:SC6531 [65310001]
  FLASH ID: 00C8006000160000
  Flash Type: SF_GD25LQ32                
  Size:0x400000(4MB)
  Reading completed.
  The data has been saved in C:\Users\Hassan\Desktop\l7_20170701_052820_FullFlash.bin, size: 4 M.)