WinRAR

WinRAR is a 32-bit version of RAR, the powerful archive manager. Read more about WinRAR
WinRAR WinRAR Video
How to use winrar and how to Open, Compress, Split and Extract rar files Video
On the video you will see how to rar a file up how to open a rar file and how to split a large file into smaller pieces and how to extract it back. Here is the link to winrar - http://www.rarlab.com/download.htm Winrar is a great tool to compress file's to smaller size files. you can even compress a whole folder containing multiple files at once.