Besides the fact, that I'm a little bit disappointed, that the auto-upload feature is reserved for Enterprise users only (to me, this is the key feature of such an add-on) and the fact, that the upload folder seems not customize able, I have to thank you for the free release of this add-on.
Please let me drag your attention on some minor issues with the German translation of the add-on dialog:
1.) Heading is too long for the dialog. Maybe it's worth choosing a smaller font-size here.
2.) "Click on 'Files' to choose files for upload". Besides the wording itself, the referred button is actually not labeled 'Files' (but "Choose files for upload"). That's a bit misleading.
3.) The actual label of the "Files" button is way too long for it as well.
4.) Found a fourth issue with the German text: "Mit diesem Dialod können Sie (große) Dateien auf ihrem sicheren Nextcloud Server..." should be grammatically changed to "...Dateien auf ihren sicheren Nextcloud Server...".