Went to service center they told me I need a motherboard change.
This is picture from internet. It happened on my note10+
It started downloading, it was going perfectly then it got stuck at 39%. I thought it will resume but after 2 hours I disconnected and it told me to do a recovery update and when connected back into cable SmartSwitch on PC showed recovery option. Click through that and again stuck at 39%. I spend 4 hours on this and decided to go to service center because I was unable to put the device in recovery mode or unable to turn it off.
At service center they spend 45 minutes and after that they told me that I need a motherboard change.
Came back home disappointed and still trying to turn off the device and thought came on(light buld lit up over my head). I thought why not try with another cable (USB c to USB 3.0 oneplus charging cable)
It worked. I was relieved and shocked at the stupidity of this situation.
I did everything exactly it was mentioned on the Samsung guide and downloaded USB drivers before I started this process.
Samsung cable did the backup perfectly.
I have Msi gt72 dominator pro g, so it can't be the laptop. I think the problem was with USB drivers provided by #Samsung
