I did upvote this idea. But I also want to share some thoughts with you who may not be very familiar with online security.
Security - how much is plenty for you personally? There's poor, good, very-good, and extremely high security measures you can take.
Obviously, what you don't want is to be the easy target - storing weak passwords and files on some mediocre service. With a little education and more than one layer of security however, you can move up to a very-good security tier for little to no cost.
Granted: the growing ability of hackers using today's incredibly powerful GPUs to process millions of hash comparisons and other tests per second (24 hours a day) to find potential matches or other clues for breaking into secured accounts is unbelievable. I'm no expert, but I've done some research.
You can search too, however, I don't recommend getting lost in time-consuming reading, overthinking and worrying (as I did at first.) In most cases there are just a few steps the average user can take to become highly secure.
These hackers mostly go for the cream of the crop. Identity theft, access to credit card info, entering your various accounts - it's a cakewalk for them when it comes to so many people out there who are not using much if any security.
For years I trusted whatever browser to store my weak and duplicated passwords, and this was no doubt the reason I dealt with fraud on quite a few financial accounts, and had email and social media accounts hacked on several other occasions.
Of course, Zero Knowledge Encryption as discussed here is obviously the highest-tier of security, but mostly required by those who have the highest-tier of *necessity* - concern for a potential subpoena, or possess legally-sensitive or highly-confidential data. These ones obviously need the best out security out there.
However, if you're coming from general file storage services and weak passwords - consider this: If you layer good encryption such as Dropbox' security and 2FA, you've already taken yourself way out of the limelight for hackers. You can also consider free or reasonably priced services such as Keeper - which has a good free version plus additional plans for individuals and families (currently 40% off at time of posting). Go that route and you've got very little to fret about.
Do some research on data privacy if you haven't already. You may find that today's top-tier services may not be a big concern for you. Of course, it's up to you, but often some simple educated steps will take you far out of harm's way.
