Proton Drive is already a FANTASTIC Product! But there is room for improvement in the file 'organizing department':

— It would be extremely useful to both be able to pin important Documents/Files and Folders, so that they are always showed on top in the File List, no matter how the rest of the files are organized (by Name, Modified or Size).

— It would also be extremely useful to be able to Color Code Documents/Files and Folders, and name the color codes, for example if you have a Project Name or Relation (Holiday, Family, Work etc.). Color Coding enables one to tie together Documents/Files & Folders from many different Folders, without having to move them around. And this is after all just an addition to some Databases, so it shouldn't be too difficult to implement?
And by both Color Coding AND Naming each Color Code, you could for instance have two Red Tags; one labelled: 'Important Project X', the other 'Remember Print Holiday'.

— Finally, it would be very useful to be able to drag Documents/Files & Folders to the lefthand sidebar for quick access, and just drag them back or 'unpin' them by some function after having selected them. There is plenty of space underneath 'My Files' — 'Computers' — 'Photos' — 'Shared' — 'Shared with me' — and 'Trash'. Make a horizontal line underneath the last item and let users drag and drop Documents/Files & Folders to pin them there and drag them to the right to unpin them, or click some sort of Icon to detach Documents/Files & Folders from the lefthand sidebar. Color Codes could also be organized in the same bar.

=== Three different suggestions, which all could be combined into countless ways of organizing Documents/Files & Folders for ease of use and quick access! 👍👍👍