Hello @riiso, I think you have unintentionally enabled the Dropbox backup feature. In order to disable, first make backup copies of the folders that is backed up by Dropbox (e.g., Desktop, Downloads, Documents etc.). Then open the Dropbox settings: click the Dropbox icon on the menubar → click the profile icon → select Preferences. Go to the Backup tab, there you can select which folder to backup or entirely disable. Once you uncheck the folders, Dropbox might delete them form your local drive, so make backup of those folders beforehand.