When you work with SD cards from different producers you realize that although cards are marked as 8GB they actually differ with some small bytes. For example I have AData SD card which is 8GB but it is slightly bigger that 8GB Toshiba SD card. And when I try to save image produced on AData on Toshiba SD card I got error saying that there is not enough space on disk. In this short tutorial I will show you how to resize an Image file to fit to another SD card.