Could someone explain whether this has an impact on the EU Privacy Shield law? Is this a workaround those? Does it only apply to data of US citizens held outsid

Could someone explain whether this has an impact on the EU Privacy Shield law? Is this a workaround those? Does it only apply to data of US citizens held outside the US or can the FBI now seize data of non-US citizens, held abroad, without going through local (non-US) authorities? If this is a workaround for EU privacy laws it'll be the final straw for me and I'll be moving my data from Google but it's a complicated area so some clarification would be nice.