Slow 5400rpm hdd speed

[Pink_Waters]

Hello guys, I have high sierra set up and ready, but I notice that it is very laggy, and apps and games takes significant time to load.

I did a black magic disk speed test and it gives me average read/write speed around 30mb

isn't that low ?

any help will be appreciated. my info in the signature.

 

[Pink_Waters]

Anyone please ?