Using compression.
A swap file is the file that an operating system uses when it is moving data. A computer creates this file when it is moving data from random access memory to virtual memory.
Swap file
read: moving data from file to memory write: moving data from memory to file
File compression
a ZIP file- it contains one or more files that have been compressed to reduce file size- you have to extract the zip file to be able to see what files are in it
File Compression
if meant by increasing paging file memory in windows, by increasing this you are increasing the amount of memory used for programs, Microsoft advises not to fool around with the file, however if you have knowledge of programs you use and memory stored; you will be able to increase or decrease this file as necessary.
An mp3 takes less memory than a wave file because it is usually compressed.
Storage and placed in memory
http://www.xfutureblog.com/2007/09/27/how-to-reduce-or-compress-avi-file-size-and-upload-to-youtube/
virtual memory