Well I have been archiving all sorts of files, especially many of my video files on Dropbox for a several years now and so far all my files were pretty safe there and encrypted. Always good to have a 2FA on your Dropbox account so hackers does not easily have access to your account. Always use common sense and avoid sharing others personal details, keep them private in your cloud storage but when it comes to backing up files offline when internet is not around, external offline drives are still the way to go! 🙂 Dropbox is convenient cause I can check my files easily on my smartphone any time, anywhere. 🙂 Hope this helps!