Golf VII ori file help

[skcelectronic]

Hi guys, please help
Should the Golf VII 1.6 TDI 77kW 2013 year original file and Tuning stage1.
I got the original files, but I am concerned about the size of files, from 4MB and 2MB.
Which file is good ?, Tool Kess v2
Please explain ..437174

[sdtsedat]

You must write the file with 4MB. Do you read with kess V2 clone or original ? Maybe someone can read this ecu edc17c64 with kess clone ?

Kind regards from Belgium

[skcelectronic]

Kess v2 can not read the ECU, can only write
files I received as the original files
why there are two file sizes, how to know which is good for the ECU?
Skoda Octavia 3 with the same engine has a file of 4MB