As others said, it's really critical for business companies to be able to upload files to a specific folder (for example, to a non-private user drive).
At best, we should be able to set write/read access by user, and shared directories (from others users) should be listed and accessible on the left panel of Drive.
Actually, it's one of the major issue my team has with Proton Drive, and we will probably go back to Google Business.
As others said, it's really critical for business companies to be able to upload files to a specific folder (for example, to a non-private user drive).
At best, we should be able to set write/read access by user, and shared directories (from others users) should be listed and accessible on the left panel of Drive.
Actually, it's one of the major issue my team has with Proton Drive, and we will probably go back to Google Business.
Keep up the good work !