Create the example img file

Hi,

I did use dd and it is working fine... But... The image file is too large. And it is also limited to the exact same type of drive used. 32Gb Scandisk uSD != 32Gb Samsung uSD.

I spent quite a while trying to figure how to do it with quite list of failures.

1- resize2fs just doesn't work.Magic number error.

2- qemu damages the img file.

3- Gparted doesn't do imaging, just cloning.

The problem comes from the fact that just trimming the img file will not work, because it also trims actual files in the process.

What I am looking for is exactly what was done to create the example img file.

Does anyone has advice?

Thank you.

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Split from How to make eMMC backup image.