2TB WD Black second HDD slows to a crawl in Windows 10

Hi Carbolic

At UserBenchmark: WD Black 2TB (2013) WD2003FZEX

The Read Write speeds are

Min read speed is = 110MB/s
Min write speed is = 103MB/s

Average read speed = 152MB/s
Average Write speed = 147MB/s

Max read speed is = 187MB/s
Max Write speed is = 198MB/s

run chkdsk on both drives (Chkdsk X: /f X=Drive letter.)

Download CrystalDiskMark - Crystal Dew World [en]

Benchmark your SDD and then Benchmark the 2TB WD Black. If it is running slower than the specs at userbenchmark.

Try disabling all auto start up software and disable all non windows services and benchmark the drives again to rule out any software conflicts.

NotaCanada.

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