Once I have setup and SD card with apps etc. I want to create an image of the card to replicate it. I have tried taking one using win32DiskImager with no success. It creates an image file around the size of the actual OS ie. 4GB and not an 8GB image. I have had success cloning using 'Hdd Raw Copy' but this is copying SD to SD and is slow. How do I create an image much like the image file provided by Udoo to install Android?