If you are getting notifications from DigitalFile, then your Mac is infected with adware. DigitalFile is adware for Mac.
DigitalFile changes setting in your Mac. First, DigitalFile installs a browser extension in your browser. Then, after DigitalFile hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.