To download files from Dropbox, you'll need to open Dropbox in an internet browser and find the file you want.
You can uninstall Dropbox on a Mac by using your computer's Trash feature, and free up space for other apps.
Even though a Windows user can join a FaceTime call, the call has to be initiated from an Apple device. They don’t have the option to start a call from their computer, which is a little awful, but ...