KB00009 - How do I back up Stickies data

Backing up

Open Stickies Settings and on the App tab, choose Backup. Then pick the file to write the backup - all done.

If you need to restore this data, to a new computer perhaps, see this article

If you'd like to know more about the files which Stickies uses, see KB00040 - What are all the Stickies files?.