Sticky Notes in Windows 11 have evolved. The old .snt file method is gone. Today, your notes are stored in a local database and, optionally, synced to the cloud via your Microsoft Account.
This guide covers to back up your notes, depending on how you use the app. Method 1: The Cloud Method (Easiest & Automatic) If you sign into Sticky Notes with a Microsoft Account, your notes are automatically backed up to the cloud. This is the recommended method. backup sticky notes windows 11