Constitutional rights don't apply to Dropbox at all. They are a private entity. If they want to inspect your data, they can
This is one of the reasons the EU courts have found that US law is not at all adequate for storing EU citizens data. In the EU, the Charter of Fundamental Rights ("Constitual rights") do very much apply to your dealings with a private company.
This is one of the reasons the EU courts have found that US law is not at all adequate for storing EU citizens data. In the EU, the Charter of Fundamental Rights ("Constitual rights") do very much apply to your dealings with a private company.