For Online Computer Support, Ask a Computer Technician
I will be the person helping you today.
I can see that you may need a little bit of extra help. In your case, you will simply need to erase the unnecessary files; however, deleting the wrong files may be detrimental.
May I ask if you still need help with this problem? If so, may I start a screen sharing session on your computer and help you resolve the problem?
Once the remote session begins, we will be able to communicate via a chat window on your computer.
It doesn't matter what is on the C: drive. Your question is regarding the external drive, correct?