Download and install Prot-On https://play.google.com/store/apps/details?id=com.proton

Log into Prot-On with your username

Please find instructions for your phone. ( Note these screenshots is from Chrome browser for Android >)

Tap and hold the issue you want to download, menu will appear

Tap “Save link”

 

File will download

Tap downloaded file

 

Select “Prot-On” to open file with