You’ll want to do an assessment of how much data and how many files, including things like audio and video files, you need to store and secure. You also want to consider if you’ll be accessing the files from your office or if they need to be accessed on-the-go or out in the field.
Communicate these needs to the professional services team of the solution you’re considering. Be sure to think of your future needs as well when planning out a solution—you don’t want to have to worry about how many terabytes you have left to use a few years from now.
Lastly, it can be helpful to look over some cloud drive comparisons to gain a better understanding of how different solutions stack up.