J2032 reServer JetPack Flash Issue

Hi Team - I am trying to flash NVIDIA Jetpack using SDK Manager and getting error. I am using VirtualBox on Mac Intel as host machine running Ubuntu 18.04. "The Target is in a bad state and and can not be flashed. Please manually put the target in recovery mode. " I already put a server in recovery mode connecting FC REC and GND pins using jumpers. What I noticed is the USB drive getting disconnected right before the error. Please let me know if there is wy to fix this.