@BrightSilence made a great earning estimator that you could use to have a rough idea on what to expect with a 5TB storage. Just copy their Google sheet to your account, and then fill in your numbers to see how long it could take to fill up 5TB, what is the possible ROI and so on…
Just keep in mind it’s an estimator, no one can really predict how the Tardigrade network is going to evolve 
But yeah, as long as you see activity, that your node displays “Online” and that your scores displayed on the dashboard do not drop beyond 95%, you should be okay.
In doubts, don’t hesitate to browse this forum, it has many many known issues already addressed and many cool tools for us SNOs 