Hi, as for note management on TI calculators. I recommend you to check out TINotes. Using an easy and friendly website, you are able to store organized notes in a folder system in their TI calculators for reference later. You can use the website to create files and folders and then TINotes will generate a script file for your TI calculators. You can easily send this file to your calculator and start viewing your notes. For detailed instructions, see the guide here.
Viewing notes on the calculator: