Stickies Database file location

As it has been previously answered:

"The Stickies files are stored in a folder here: YourUserName > Library > Containers > Stickies > Data > Library > Stickies Each note is a separate file in that folder. You can simply compress that folder in the finder (or just copy the folder) and back it up to another location if you want (Dropbox/G Drive/iCloud etc.) You're welcome."

A little context, if you can't see the Library folder, press Command+Shift+Dot. Your hidden files will become visible.