I want to backup the entire SSD I'm using for Kodi. I have a spare HDD and a USB memory stick. The Kodi SSD is supposed to be 120GB, the HDD also 120GB and the USB stick 128GB. My problem is that both the HDD and the USB stick are in reality a few GB smaller than the SSD. I have tried various cloning software (including Clonezilla in advanced mode on my Linux PC) and each time the clone seems fine but when pluged into my RPi4 fails to boot fully.
What happens is that the colour gradient square comes up and nothing else happens. Burning a clean image onto the HDD or USB stick and everything works.
Either I have to go out and buy another SSD or there is something magical I'm missing. I hope the latter.