How to Check SSD Health on Windows: Free Tools Guide

Quick Answer

You can check SSD health on Windows for free using built-in tools like Windows Device Manager and third-party software such as CrystalDiskInfo. These tools read SMART data from your drive to flag issues like high temperature, bad sectors, and remaining lifespan.

What Is SMART Data and Why It Matters

SMART stands for Self-Monitoring, Analysis and Reporting Technology. Every modern SSD continuously logs internal health metrics including total bytes written, power-on hours, reallocated sectors, and temperature. Free tools read this data and translate it into a health status. Monitoring SMART data regularly lets you catch a failing drive before it causes data loss.

Free Tools to Check SSD Health on Windows

CrystalDiskInfo is the most popular free tool for this. It reads SMART attributes from all connected drives and displays them with a colour-coded health status: Good, Caution, or Bad. It also logs temperature over time, which is useful if you suspect thermal issues in a poorly ventilated case.

Windows built-in tools: In Windows 11 and Windows 10, you can open Task Manager, go to Performance, click on your drive, and see basic information. For deeper insight, open Command Prompt as administrator and run:

wmic diskdrive get status

This gives a basic pass/fail health report.

HD Sentinel offers a free version with more detailed reporting than CrystalDiskInfo for users who want more granular data.

Key SMART Attributes to Watch

When reviewing SSD health data, these attributes matter most:

• Reallocated Sectors Count: Should be zero. Any value above zero means the drive has already started working around failed cells.
• Wear Levelling Count: Indicates how much of the drive's write endurance has been used. Lower is better.
• Power-On Hours: Total operating time. Useful for gauging overall drive age.
• Temperature: SSDs should operate below 70 degrees Celsius under load. Sustained temperatures above that reduce lifespan.
• Uncorrectable Error Count: Must be zero. Any value here is a serious warning.

How Often to Check SSD Health

For most users, checking once every few months is sufficient. If you are writing large amounts of data regularly (video editing, backups, virtual machines), check monthly. Set CrystalDiskInfo to launch at startup in resident mode so it alerts you automatically if any attribute crosses into warning territory.

Frequently Asked Questions

Is CrystalDiskInfo safe to download and use?

Yes. CrystalDiskInfo is a well-established, widely used free tool. Download it from the official CrystalMark website.

My SSD shows Caution status in CrystalDiskInfo. Does that mean it is about to fail?

Not necessarily. Caution often flags when a specific attribute has changed from its baseline value. Check which attribute triggered it. Wear levelling or temperature flags are less urgent than reallocated sector counts.

Can I check NVMe SSD health with the same tools?

Yes. CrystalDiskInfo supports NVMe drives. Note that NVMe drives report slightly different SMART attributes than SATA SSDs, but the health status display works the same way.