DropBox is outdated and a joke. Every time a client of mine uses them and I have to get them their files via DropBox it is always slow. Every other time there are issues with the upload or download and every few times I get locked out because they don't recognize me anymore. I NEVER have any of these issues with Google drive. Today I am making it my mission to convince yet another client to switch. So far I am 9 for 9. I feel pretty good about my odds on this.