What does v30 mean on SD card?

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Tags

1. #speed
2. #extreme
3. #memory
4. #designation
5. #sandisk
6. #popular
7. #video
8. #least
9. #sustain
10. #recording
11. #continuous
12. #performance
13. #update
14. #level
15. #bears
16. #meaning
17. #class
18. #edition