I know this thread is old, but I experienced a weird thing the other day.
It doesn’t relate directly to OSMC, but is relevant to this thread.
I set up a RPi2 as a music player with a HiFiBerry Amp+ and all worked great (I call it my HiFiPi). It took me a while to get right as I’m a BIT of a Linus noob. Anyway, after it was working the way I wanted it to, I thought it prudent to use win32diskimager to make a .img backup of the 8GB SDcard. The other day the HiFiPi won’t turn run. I check everything I can, but nothing. So I decide to write a new card from the .img file I had saved on my laptop I had another identical 8GB SD card, but when I try write the disc image, it is too big for the SD card!
So, what did I do wrong? Can I make that .img file smaller? I know that no more than 2GB is used out of the 8GB card.