It is currently very challenging to upload large amounts of data into Proton Drive. I have some data that I want to back up into the cloud, which currently sits on an external drive. The Proton Drive desktop app will not accept the folders on the external drive for backup (presumably because it is not an internal drive), and uploading via the web interface is extremely unreliable unless you manually do it in small chunks, which is tedious.

Would it be possible to add a function to the desktop app to copy large amounts of data into Proton Drive or copy it out of Proton Drive in a single operation? Meaning not setting up sync between local and cloud folders, but rather a one-time upload/download of selected folder(s) to/from a specific location.

This could be a very easy-to-implement feature since all the core logic already exists, but it could increase the utility for users immensely.