You can use Win32DiskImager to make backup copies of memory cards.
https://sourceforge.net/projects/win32diskimager/
To restore such an image you need a card which is at least the same size as the image. You cannot shrink the size onto a smaller card.
Exactly how I do it. However you are incorrect on shrinking. The latest version allows for shrinking if card is smaller.
The RDB may not like it, as it will think it has more space than it has.
Spose shrinking is best used in linux situations, as you can get away with it.
OP, could also, just use WinUAE imaging in HDD selection screen. I have used this before and then win32imager to transfer to card.
