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OneDrive is much better than the Dropbox, Onedrive give you Unlimited space with Office 365 for $70 year
I'm an independent Contractor with several clients - that have their own drop box accounts.. So I only need to share a small portion of my space with them, but need a big space for myself for all of them ... Was recently on Vacation, & needed to access my work, & wanted a backup of all my work, to the hard drive I carried with me. But my Pro Plan was too small..... Drop Box needs to have a Bespoke single user plan with at least 5 TB or Unlimited would even be better....
Just my 2 cents...