What is the primary function of the SCANDISK utility?

The primary function of the SCANDISK utility is to scan and repair file system errors. SCANDISK works by examining the integrity of the file system on a storage device, such as a hard drive, and performing repairs if it finds any issues. This includes fixing corrupted files, recovering lost clusters, and ensuring that the file system structure is operating correctly. Its purpose is essential for maintaining the health of the data and preventing potential data loss due to file system damage, which can occur due to improper shutdowns, virus attacks, or hardware failures.

In contrast to the other options, managing storage devices does not fall within SCANDISK's scope; instead, that function may be handled by different utilities or system settings. Optimizing system memory pertains more to RAM management and disk caching strategies, which are not features of SCANDISK. Lastly, downloading necessary updates is outside the utility's function, as SCANDISK is designed solely for file system maintenance rather than software updates or installations.