Getting 18-25 mBps while copying any data in my 2 weeks old seagate ST2000VM002-9UY 7200 rpm internal hard drive

Not_mee

Prominent
Aug 3, 2017
5
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510
I am not copying huge amounts of small files. I am copying individual big videos or iso files.
The task manager shows about 50 mBps at 100% disk usage as I am writing and reading from the same disk. I used crystaldisk mark 5 and I got significantly better results. The results were as follows-
. read[MB/s] write[MB/s]
. drive c| drive d drive c| drive d
Seq Q32T1 125.6| 108 131 |111.4
4k Q32T1 0.5333| .497 1.196 |1.226
Seq 128.6| 108 129 |110.9
4K 0.501| .432 1.209|1.110

I guess I am having this problem since I bought it.

Also, in some tasks the task manager shows over 100mBps and I actually get 100mBps. Like when handbreak was loading hundreds of 20-40 mB files.
I have an external usb 3.0 hard drive and I get about 40 mBps read as well as write speed on it. It doesn't matter if I connect it to a usb 3 port or usb 2 port.

I checked for the DMA thing but I couldn't find any channels in the IDE ATA/ATAPI controllers section. I just see controller for my hard drive.
I tried searching for some related stuff in bios but all I found was that my hard drive was set to AHCL mode or whatever it is.
I even tried changing the sata port to which the hard drive was connected in my motherboard.

My specs are-
intel core i5 7500
8gb ddr4 2400 MHz ram
msi h-110 pro vh motherboard
zotac GeForce gtx 1060 6gb
coolermaster MWE 450W PSU
windows 10 64bit
if that helps.

Forgot to tell that the transfer speeds hit about 100mBps for the first few seconds then it drops down.
 

Not_mee

Prominent
Aug 3, 2017
5
0
510

I am not sure. There's no windows defender in my task manager. However there is an antimalware service executable. I just opened windows defender. Its out of date but it shows that the real time protection is enabled but in windows settings it shows real time protection enabled but it says the following-
"You can turn this off temporarily, but it's off for a while we'll turn it back on automatically.