What file sharing do you use as an engineer?

Hey, I've been looking for different file sharing apps that are more collaborative to help with communication between me and a client, especially during the mixing stage with the ability to give timestamp comments and such. One that I've seen is Boombox.io where you can do projects and add people to the project, it also doubles down as it accept image files so I can additionally use it for photography.
What file sharing services do you use that provide similar features that you have enjoyed?
Thanks!