[GTALUG] Compressing an image of a microSD card

[El Fontanero]

On 2020-05-14 6:20 p.m., Giles Orr via talk wrote:
> The more I think about it, the less I want to modify either of them.
> Thanks for clarifying the process: it solidified my opinion on what
> should be done (although not in the direction I expected).  ie. 10G
> really ain't that big, I'll just keep the backup as is.  Thanks
> everyone.
>
Operate / experiment on a copy of your backup!

I do this sort of thing a fair bit (as originally described) when 
backing up the state of yet another raspberry pi experiment :-)