Illustrator file extensions are *.ai, *.eps, *.tif, *.tiff, *.pdf and it is usually stored in My Documents folder.
Read more about automatic My Documents folder backup with Novosoft Office Backup.
You can also specify Illustrator file extensions in Step 2 of the New Task Wizard: What to back up (Expert Mode) and Novosoft Office Backup will find and back up all files automatically.
Go to program settings backup
See also: E-mail backup, Messengers backup, MS Office backup,
Registry backup, My Documents backup, Desktop backup, Favorites backup, Documents backup