COMPARE-MIRROR ERROR STOPS

[sun12758]

USING
WIN 10 PRO VERSION 1909 (OS BUILD 18363.535)
Freefilesynd 10.18 (build 2019.11.19)


After install win 10 pro, mainboard chipset, I installed freefilesync and did mirroring.
I failed 3-5 times everytime I tried to mirror files.
I am trying to mirror 1.2G C drive (total 2T HDD) to G drive (total 2T HDD)
When I push Compare button it start to compare files.
After compare is dons, I push mirror button.
Mirror starts, and in few seconds, it stops. and not copying anything .
So I push X button to stop. and the program has no response at all.

What can I do to do mirroring properly.
Is it the problem with my hardware? ( I newley installed the WIN 10 because it shows BLUE screen time to time)
Please help.
Thank you.