Before I moved I used to use my web server.

My Domain . Com / files . Zip And I would set a password on the zip. After they download it, they tell me and I remove the file.

Usually you pull the knob and it is removed. But being that old it might be stuck or break, but it’s also strange if it was just removed recently. Maybe she needs to pry it on both sides at the same time?

Also tell her to barely tighten those screws. They were too tight and the heat/cold changes was enough to crack it.