@nextcloud
For now WebUI.
If only the #desktopclient on #Linux would have on-demand files (where all folders and files are visible in file explorers, but items only get downloaded on the spot when requested and uploaded when finished).
But then, I don't know any cloud storage that has this in their Linux desktop client, despite it being so normal on Windows. Whoever gets this working first will have a real game-changer!