Comment by nisegami

It really makes no difference where the data is stored once it's accessible by a US company:

"The CLOUD Act primarily amends the Stored Communications Act (SCA) of 1986 to allow federal law enforcement to compel U.S.-based technology companies via warrant or subpoena to provide requested data stored on servers regardless of whether the data are stored in the U.S. or on foreign soil."

from https://en.wikipedia.org/wiki/CLOUD_Act