sm-n920c flashing failed plz help

hi

This phone stopprd in the Wi-Fi update
In the last binary u4

I did not find frimware binary u4



All experiences were unsuccessful


File analysis... OK
Total file size: 0xE412B6F0 (3649 Mb)
Searching USB Flash interface... COM4 detected
Setup connection... OK
Reading PIT from phone... OK
Sending sboot.bin... OK
Sending cm.bin... error timeout






any solutions, guys