Totally agree! An 'Open With...' feature in Proton Drive would be a lifesaver for Google Docs users. While we wait for that, I’ve been using Snaptube (https://baixarsnaptube.com.br/) to download videos and music in HD—saves me from juggling multiple apps. Works like a charm for offline content!

Workaround: in ProtonMail click the attachment using any download/open button, then cancel.

You wont see this explaned by ProtonMail app, but this file IS saved to your device, even if you had no app to open it.

Now any other (file manager, or other file loading) app can find it in recent or dow load files.

The attachments should be openable in any application that manages files. Now JPEG XLSX JSON and PDF attachements can only be opened in a few apps, and NOT SAVED to your device.

How am I supposed to download the XLSX so I can upload it in some other app/site?

ProtonMail does not even allow me to open it in ProtonDrive or Files on Android.

Until reading this thread I had assumed this was an issue with my phone, since there is a download button But it is just an image, not a live link to click.This would be pretty basic functionality even for free email providers a

I had the same issue with a CSV file.

I could not download the attachment unless I installed an app which can handle CSV files.
It's very silly this is not possible.

I was actually quite surprised when I discovered I could do nothing with an Excel (xlsm) file sent to me: I couldn't open it--without using MS Office 365 (which I don't want to do) --and I couldn't even save it to the phone (to then open in some other app). So far I've not been able to figure out if I can force the phone to use some other app (e.g., WPS Office Lite) to view the xlsm file.

The current PDF viewer integrated into the Android version of Proton Drive is very insufficient for viewing PDF files.

I would like to have an option to open PDF files in another app when accessing PDF files in my Proton Drive.

See: "Open in another app" feature in the Android version of OneDrive.

Currently a way around this is to download the PDF file locally, then navigating to the Adnroid File Manager, finding the downloaded file and opening it in a PDF viewer of your choosing.

Proton mail app does not give a download option for attachments, like gmail, etc. I get a .pdf attachment, and proton says I can't open it. I can open pdf files on my phone, but when I try to open a pdf attachment in proton mail, it says no app can perform this action. If I cant download it, I can't open it. Should I have to use another email service, or spend a bunch of time trying to get it through drive?