It's a little different for Dropbox, MEGA and similar services because they sync your machines. So long as you have at least one machine with those tools instal

It's a little different for Dropbox, MEGA and similar services because they sync your machines. So long as you have at least one machine with those tools installed and running, you have a copy (unless someone finds an exploit in their servers and deletes all their customer data ... so yea .. still keep backups).