Can anyone suggest the best way for me to backup the current state of the system from my Nano’s (128GB) SD Card?
I’d like to clone the card completely so that if I break something I can restore the system to it’s current state by re-flashing the backup using balenaEtcher (instead of using the default NVidia image).
I’ve tried Win32DiskImager in Windows 10 with the SD card in a reader, but although it read an image I’m not convinced it’s correct as there are 12 partitions on the SD card and windows maps a separate drive to each (and annoyingly brings up 12 windows each with a formatting error) when I plug in the reader and judging by the size if the image it created it only read some of the sd card.
I have a Ubuntu dual-boot on my host PC too, so maybe there’s a way I can do it from that? I’ve seen some docs on doing something similar for Rasp. Pi via ssh using dd command, but I couldn’t get the this to work as I’m fairly new to Linux.
Can anyone point me at a technique that will work?