New WD 1tb blue hdd very slow

Internal Drives WD Blue
1

My wd 1 tb blue hdd is very slow just purchased 15 days ago.
I m using windows 10 pro and have made two partitions as E & F drive.
(windows is installed in C drive).Whenever i click on either E & F drive it
takes a long time to open and the folders under these drives also takes time to open
and also copy data to and from E & F drives take a long time.
To troubleshoot i have installed windows twice with fresh partiton.
Pls suggest what to do