Re: Two words
As Rob Joyce, head of the National Security Agency (NSA) Tailored Access Operations (TAO) hacking team said in Janaury at the Usenix’s Enigma conference, once you use a cloud company you are handing your data over to them and so relying on their security.
In the US, National Security Letters (NSL), in which the authorities can secretly subpoena records & which over 10,000 per year are issued, are used for all sorts of investigations not related the National Security.
For example, the American Bar Association Journal & Washington Post have had a number of stories about the NSA supplying the Drug Enforcement Agency with info, and the DEA then creates fake back stories (lying to the courts) to cover up that the NSA was the source.
There's no reason to think that this illegal behavior is limited to the DEA.
Assuming you were not smart enough to have never put it in the cloud in the first place, taking your data back from "the cloud" to your local control makes a lot of sense. .