How do I check the speed of my external hard drive Mac?

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Tags

1. #drive
2. #choose
3. #installed
4. #external
5. #start
6. #begin
7. #available
8. #downloaded
9. #target
10. #determine
11. #answer
12. #connect
13. #speed
14. #using
15. #store
16. #write
17. #select