Disk Utility -
Disk Utility is the name of a utility created by Apple for performing disk-related tasks in Mac OS X. These tasks include:
                
                

Open-source utility for monitoring S.M.A.R.T. data, disk temperature and more. Offers portable use, dark mode, no ads or tracking, and supports 30+ languages. Designed to provide an accurate health status and includes features such as temporary file deletion and file recovery options.
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CrystalDiskInfo is a HDD/SSD utility software which supports S.M.A.R.T.
It shows the health status much more clearly than similar tools.
The “Function / Graph” is especially interesting for the “Reallocated Sectors Count”.
If it increases over time or is very high already, the hard drive may need to be replaced. More than 30 languages.