Hey there @TheWolf - how are you today?
As you want to make permanent changes to your computer that do not sync back to the website you'll need to unlink the computer first. Follow these steps to unlink a computer:
1) Right-click the Dropbox icon in the system tray, or menu bar, by the clock
2) Click on your profile picture or initials to the right of the search bar and select 'Preferences' > 'Account'
3) Click the 'Unlink' button
4) Afterward, Dropbox will prompt you to re-register. Quit!
You can now safely move or delete files in the Dropbox folder and not affect anything else.
Note that the Dropbox folder itself is still there (without its syncing properties now that you unlinked the account from the app). If you relink to a different Dropbox account, the application will detect that another Dropbox folder already exists on the computer, and will give you two options: 'Choose Another Location' or 'Install'.
If you want your new Dropbox folder to be in a location different than your existing folder, click on 'Choose Another Location'.
If you want your new Dropbox folder to be in the same location as your existing one, click on 'Install'. This will rename the existing Dropbox folder to 'Dropbox (Old)' and will create a new Dropbox folder for the account you’re currently linking.
I hope this information helps and please let me know if you have any more questions!
Walter
Community Moderator @ Dropbox
https://dropbox.com/support
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