How to download a PDF on your Android.
To download PDFs directly to your Android, follow these easy instructions:
Open the file you want to save as a PDF.
Tap the 3 dots upper right hand corner on your Android, in the drop down select Print.

You will need to have a printer setup on your Android.
If you don’t have a printer setup you can always Save file and open the PDF on a computer that is setup with a printer.