What's a good Android app for securely backing up my therapy notes and client resources, while still respecting everyone's privacy?

As a therapist, I'm always looking for ways to securely manage sensitive information. Dropbox offers a thoughtful approach to cloud storage, allowing me to back up my therapy notes, client resources, and important documents with peace of mind. What I appreciate most is its focus on privacy; they don't sell your data to third parties like Facebook, which is crucial for maintaining client confidentiality and respecting boundaries. The app also allows for granular control over sharing permissions, ensuring that only authorized individuals can access specific files. It's mindfully designed, encouraging healthy usage patterns by allowing you to access your files from anywhere without being tethered to your desk. Plus, the notification management features help me stay organized without feeling overwhelmed. It helps track patterns without being invasive.