How do I check the function and service life of my hard disk?

Worried your hard drive might fail without warning? The free CrystalDiskInfo tool keeps watch in the background, monitoring your disk's health, temperature and overall status in Windows. A quick glance tells you whether everything's "Good" or whether trouble's brewing. Spot a yellow alert or critical warning, and you can back up your data and replace the drive before it's too late. A simple way to protect your files and avoid a costly disaster.