Defragmentation software primarily does what?

• A. Reorganizes data on a hard drive to put fragmented files back together and collects free space
• B. Encrypts files
• C. Deletes temporary files
• D. Backs up data

Answer: (A)

Defragmentation software focuses on reorganizing data on a hard drive so that pieces of the same file are stored together and free space is consolidated. When files are created, deleted, or edited over time, their data can become scattered across the disk, which makes the read/write head move around more and slows access. Defragmentation moves the fragments into contiguous blocks and packs free space into larger, uninterrupted areas, improving sequential read/write performance. It does not encrypt files, delete temporary files, or back up data—those are different tasks handled by encryption tools, cleanup utilities, or backup programs. On traditional hard drives, this reorganization is the main way to boost efficiency, whereas on solid-state drives the benefit is often less pronounced.