Question why transfer from my 2nd drive to ext hdd extremely slow

Terrance_2

Honorable
Oct 23, 2015
9
0
10,510
my pc got a ssd as main drive and 1tb hdd as 2nd drive.

whenever i transfer from my 2nd drive to ext hdd (usb3), it goes at around 10mb/s (tried all method from google, update driver etc)

but when i do it from 2nd drive to ssd (main drive), it went around 60mb/s and then 40mb/s from my ssd to ext hdd.

combination of 2 steps in 2nd method actually double faster than 1 way transfer of 1st method !!

what's wrong with my system?