The answer depends entirely on your device and operating system. Here is the definitive guide to finding your saved Sticky Notes. Microsoft has changed the backend for Sticky Notes twice. Here is the breakdown for modern versions.
Because Microsoft syncs these notes to the cloud, the safest way to "find" them is via your Microsoft Account. Your notes are actually stored inside your Outlook.com account. Log into Outlook.com on any browser and look for the "Sticky Notes" icon in the left-hand menu. where are sticky notes saved
Inside that folder, you will find a file named plum.sqlite . This is a database file. You cannot open it with Notepad; you need a SQLite browser. Messing with this file can break the app. The answer depends entirely on your device and