it would be interesting to be able to use piclone on a loopback device
http://tldp.org/HOWTO/Cryptoloop-HOWTO/loopdevice-setup.html
=> instead of a real device, a file created on top of a filesystem, mounted as a loopback device
interesting for a board with a HDD attached (USB or SATA)
what is needed is to display the available /dev/loop? in the destination folder
Let's see what I can do to help here. => proposal see #8
I mean creating an empty file of approx 32GB (if SDcard or eMMC is of 32GB)
dd if=/dev/zero of=SAVE20160616.bin bs=100M count=330
sudo losetup /dev/loop0 SAVE20160616.bin
then it is easy to 7zip the file SAVE20160616.bin (and/or MD5sum)