There are various alternatives to Dropbox, such as #Owncloud and #Syncthing. Dropbox is an untrustworthy company run by untrustworthy people."With Dropbox Infinite, we’re going deeper: into the kernel—the core of the operating system. With Project Infinite, Dropbox is evolving from a process that passively watches what happens on your local disk to one that actively plays a role in your filesystem,"
https://motherboard.vice.com/read/dropbox-infinite