Final answer:
Automatically managing paging file size allows the operating system to determine the optimal size of the swap file based on usage and available space, helping ensure smooth system performance.
Step-by-step explanation:
When a computer system says it will automatically manage paging file size for all drives, it means that the operating system will handle the size of the paging file (also known as a swap file) without user intervention. The paging file is used as virtual memory and complements the physical RAM on the system. It is a space on the hard drive where the operating system can temporarily store data that it can no longer hold in RAM.
By managing the paging file automatically, the system decides on the optimal size of the paging file based on the computer's usage patterns and available disk space, which can change over time. This helps ensure that the system runs smoothly, even as demands on memory change. If you manually manage the paging file size, you would need to determine the appropriate size yourself, which could involve a bit of trial and error to get right.