What's the difference?

Using local storage, your account keys may be more easily accessible by third-party programs, unlike in your password manager which has additional protections built-in.

In either cases, the strongest way to protect your account keys is to use a strong passcode, which will be used to encrypt your keys and prevent any software or operating system from reading them. If you plan on setting a passcode, you can safely use local storage.

Granting Standard Notes access to your system password service

Note that granting access to your system password service will allow Standard Notes to read, write, and delete any of your saved passwords. Standard Notes will never use this privilege to do anything more than reading and writing to its own entry.

1. Quit Standard Notes
2. Open your software store (Ubuntu Software Center/Snap Store)
3. In your installed apps list, click on Standard Notes
4. Look for a Permissions button
5. Make sure the permission associated with reading and writing passwords is checked
6. Open Standard Notes again

Granting Standard Notes access to your system password service from the command line

Run the following command:
snap connect standard-notes:password-manager-service