So along with the OP question, I have a ton of pictures on my current D1, so when I get my new phone, the higher the class, the faster the phone can bring them up and sort through them?
I thought you could only get class 6 64GB micro SD cards. And will you see the difference in class 4 vs class 10. Hopefully...
Class Speed
Class 2 2 MB/s
Class 4 4 MB/s
Class 6 6 MB/s
Class 10 10 MB/s