Hey @BeMiJeSc, thanks for posting here!
It sounds like you're trying to upload the files through the desktop app on your computer, is that right?
Can you let me know what the sync status shows at the moment? If you're not seeing the Dropbox icon in your menu bar, please make sure the app is running by launching it from your Applications menu.
Let me know what you find!
Daphne
Community Moderator @ Dropbox
dropbox.com/support
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