How to backup USB drive?

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Hi, sorry to have a side question!

I tried to backup and restore the rootOnUSB drive but I failed. The system won't start. Do you have any recommendation how to backup the USB drive? Thanks a lot!

Backup sudo tar -cvpzf jetson_nano_usb.tar.gz --one-file-system /media/nano/rootOnUSB/ Restore sudo tar -xvpzf jetson_nano_usb_ros_realsense.tar.gz -C /media/nano/rootOnUSB --numeric-owner