by kevin » Tue Mar 24, 2015 4:29 pm
You will just need to backup an image of your SD Card
For Windows you can use Win32 Disk Imager
For Linux, you can use the "dd" utility - sudo dd if=<device> of=saved_image_filename.img bs=4M where <device> is the device name of the sdcard (/dev/sd...) - you can find this with a 'dmesg' when inserting the SD Card via an SD Card reader.
Not an employee of the company. Just here to help and keep things clean.