Hi Mathew,
1. What exactly happens whe you try to add the apps to the T1-84 Calculator? Do you get any error messages?
2. Native instruments massive download torrent. Do you face any connectivity issue with the device?
3. Was it working before?
Ti 84 Plus Calculator Download
It looks we need to change settings in the device in-order to save or add the apps.
You may refer this article from Texas Instruments:
Step by Step Instructions for downloading Calculator Software Applications (Apps) and Operating Systems (OS) onto TI Graphing Calculators.
TI-84 Plus Graphing Calculator For Dummies By C. Edwards The Texas Instruments website contains over 40 applications that you can download and install on your TI-84 Plus calculator. The TI-84 Plus is a graphing calculator. Students can use this. For each file. Download games, then transfer the game files to your calculator using TI Connect.
Also refer:
Games for TI-83 Plus and TI-84 Plus. Download free games for TI-83 Plus and TI-84 Plus Silver Edition graphing calculators. If you’re not sure how to transfer these games to your calculator, visit our tutorial on Transferring Programs to the TI-83+ and Transferring Programs to the TI-84+ and TI-89 Titanium. Results 1 - 15 of 5782 - 0 02/20 The Texas Instruments website contains over 40 applications that you can download and install on your TI-84 Plus calculator.
Troubleshooting Error Messages or Unexpected Results
If the I would also suggest you to contact Texas Instruments for further assistance.
Hope this information helps. Reply with the status so that we could help you further.