These options control the creation of backup files when you save a modified file to disk. You can control where backups are stored, how many old backups to keep and options for controlling the style of the backup file name.
"CRiSP is awesome, especially for anyone who likes to use Brief on the PC, and hates vi. I use it for all my code development and maintenance tasks. It's also great for editing binary files or very large files, or files which have very long lines, which cause other editors to choke."