How to figure this out with Nintendo Switch SD cards?

Hi, I just bought a new GameStop 64 GB SD card because my other Nintendo 128 GB SD card has run out of space for screen shots (I have taken at least 10,000). Both my system (it is an OLED) and the old SD card have plenty of space for download and games but I just wanted to change to the GameStop one so I can take new screen shots. Does anyone know how this can be done while keeping the same game data at the same time or is it not possible? Thank you.