Dropbox syncing files already deleted from laptop and Dropbox

Follow up (Since I cannot edit my post anymore) here is the result from the properties check:
Size: 1,04 TB
On Disc: 628 GB
Total: 568.532 Files | 10.196 Folders

Hey Kismuntr​, thanks for the added info! 

Do you have any third party app, proxy, VPN, firewall, security software, or even ISP/router settings that could be hindering the syncing process? If so, then could you try temporarily disabling those? Maybe that will do the trick.

You may additionally keep in mind that it seems that you have more than 300K files inside your Dropbox folder, which could be the culprit for the performance issues you’re having (you can also read more details here).

If I were you, I'd try to remove some folders with the help of selective sync.

I'll be waiting for your updates! 

Thank you Megan​ 
I did check if any third party apps  are hindering the process and those were sadly not the culprit. I also apply selective sync wherever possible.

The issue here is that my device is trying to sync files that are no longer existing. I deleted those files and the app still tries to sync them. All my other 3 connected devices (android phone, ipad, and acer laptop) synced fine without any troubles. All 3 state: up to date.
It is only that one device where I deleted those files that is stuck trying to sync them (they are deleted both on the device and on dropbox.com = permanently)

Hey Kismuntr!

Can you also try signing out of the app, and then sign back in? You can always use these steps. 

Megan​ I avoided doing so of the risk that my "online only" files would then also try to "sync" and add additional workload. Is it safe to log out and back in without creating more workload?

Hey Kismuntr!

Signing out and back into the app shouldn't typically affect the status of your files. However, if you notice an increase in your syncing status after signing in, please let me know and we'll proceed accordingly. 

Hi Megan​

I logged out of the app as you suggested. Now the app won't let me log in anymore. It requires a new location for the Dropbox folder and, as far as I understood, the app wants to resync all my files that are already existing on this device into the new folder. Choosing the same location is not possible. It is basically setting up dropbox on my device brandnew despite there already being a dropbox folder with all my files. Since I am unable to do so I can also not log into the app anymore.

Hey Kismuntr!

You should be able to relink the app to your existing Dropbox folder. During the installation process you should be able to see the 'advanced' setup.

This should allow you to choose the parent folder of the existing Dropbox folder as the location for the new install, so as to merge the folders without re-downloading the files.

Can you try out these steps, and let me know how they work out for you? 

Hi Megan​ 

I followed the steps (clicked on advanced setup to choose my already existing folder). It still says that this is not possible "There's already a folder or file named Dropbox". It wants to rename it and create a new "dropbox location" but then says it is not able to rename the folder and I have to choose another location, thus creating a whole new instance for dropbox and redownloading all the files that are already on my device (which I want to avoid).

Can you try selecting the parent folder then and not your already existing folder Kismuntr?

If you still get the same results, I'd appreciate a screenshot so that we can have a visual too.