I have a smartphone without the possibility to insert an SD-card. I would like to make a dump of the biggest partition (cause I lost files and I'd like to use a dump to recover them).
The partition is 10GB.
I was looking for an ADB command to pull using dd but nothing...
I tried to use Carliv touch recovery with a 32GB USB key by OTG but the USB key didn't mount ... Then I couldn't use dd directly on the phone using Aroma file manager and a terminal emulation.
As said in comment, adb pull /dev/block/mmcblk0 mmcblk0.img worked for me. A "DD image" is only a binary image file of the device.