Which SD to buy? What are the fastest SD?

Here is the list, from the slowest to the fastest updated in October 2018

Just read the abbreviation on the card.

SD : the oldest. Capacity from 128 MB to 2 GB Format FAT 16

SD HC Capacity from 4GB to 2 GB Format FAT 32

SD XC Capacity from 64GB to 2 TB Format exFAT

SD HC I - SD XC I It is an SD spec. 3.0 very fast, suitable for 1080p

SD HC II - SD XC II It is an SD spec. 4.0 very fast, suitable for 4K

SD speed class

2 = 2MB / s

4 = 4MB / s

6 = 6MB / s

8 = 8MB / s

10 = 10MB / s

UHS speed class

1 = 10MB / s

3 = 30MB / s