Who controls your data when you use cloud storage?

When it comes to cloud storage, the question of who controls your data is a crucial one. As a user, you entrust your files and information to a third-party service provider, but do you really know who has access to your data and how it's being used? With the increasing prevalence of cyber threats and data breaches, it's important to understand the security measures in place to protect your data. So, who exactly controls your data when you use cloud storage, and what steps can you take to ensure its safety?