Why HDD is slow?
I bought SSD Savage 240GB HyperX and replaced HDD with SSD, I also bought caddy and placed HDD Hitachi 250Gb HTS545025B9SA02 into caddy, how was described in manual for my MacBook Mid 2010 7.1 MC374xx/A.
I rebooted computer from HDD and it was successful. Sierra started quite fast.
Then I formatted SSD
Then I run "Install Sierra" file and it installation never finished after 12 hours.
After some investigation it seems HDD/SSD general speed is very slow. Just to copy 5Gb file cost 2 days.
Installing Sierra from USB the same issue.
Can I do something to fix it or should I give up on caddy and SSD?