how do you collaborate with teams without worrying about data security?

One thing i didn't really think about before working on bigger projects was how stressful it is sharing sensitive stuff across teams. like once you start dealing with client files, internal strategies, product ideas, or private docs, you suddenly realize how sketchy some workflows are.

my team has people working remotely, freelancers jumping into projects, different departments reviewing things, and at one point we had files spread across random chats, docs, and platforms. it got to the point where nobody even knew who had access to what anymore.

now im trying to be way more careful about where we collaborate and store information. weve been looking for tools that let people work together easily without feeling like our data is floating around unprotected somewhere.