What Does Swap File Mean?

A swap file is a Microsoft Windows hard disk drive file (HDD) that provides virtual memory to its OS and programs and supplements the system’s existing solid state physical memory.

Techopedia Explains Swap File

Introduced to supplement physical PC memory limitations, swap files are still used in operating systems like Windows 7 and Windows Server 2008, as virtual memory is a cheaper alternative to magnetic media. A typical swap file is equal to or larger than the system’s total installed physical memory. The exact size is based on the OS and amount of physical memory, as well as applicable personal and/or corporate policies and preferences.