But what if you just don’t want to recover that file. Once you have deleted it from your computer, it should no longer be available in Dropbox. Moving on, once you delete a file from a local folder, the files are not removed from Dropbox servers. Deleted files are moved to another place from where the user might want to restore it later on. So basically, you will have to delete the file manually.
Simply, log in to Dropbox, choose the Show Deleted Files option, and select the file you deleted. After doing that click more and ‘permanently delete’ to delete your files for good and forever.