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If you need to check your hard disks, solid state drives, USB drives, their read and write speeds and monitor their state and temperatures, then these 2 free portable tools for Windows OS – CrystalDiskMark & CrystalDiskInfo – are of great use to you.
Benchmark & Monitor hard disk & USB drives
CrystalDiskMark & CrystalDiskInfo tools
You can test the read and write speed of your hard disks and USB drives using CrystalDiskMark.
CrystalDiskInfo is an HDD/SSD utility that supports S.M.A.R.R.T.
It supports some external USB hard drives and helps monitor health and temperatures. It raises a lot of information about your hard disks.
See also HD Tune and PC Stress Test free software for Windows.