Which back-up method should I use?
Time Machine will back-up all of your files automatically.
Manual back-up allows you to control which files are backed up.
How to Export Bookmarks in Chrome, Safari, and Firefox
How to Manually Back-up Apple Apps:
How to Back-up to iCloud Drive
To back-up each of the apps below, you'll need to sign in to Managed Apple ID (MAID). Once signed in, the apps will backup to iCloud Drive automatically.
How to Back-up to the Files app
How to Back-up to Google Drive