My Dropbox Windows desktop application is failing to sync. It's been telling me for days that it needs to download 4544 files, but it's not doing it. It is stopped and tells me that the remaining time to do so is 2 or more days. My internet connection works fine, I have high speed fibre, and until a few days ago, everything worked OK. I simply wanted to change some folders to be "online only" and since then I have Dropbox blocked on download (it does upload files). Can you help me? Thanks a lot!