Something that's confusing me: How will companies like Facebook store inter-country friendship / chat data? If I'm in the EU and I'm friends with someone in the

Something that's confusing me: How will companies like Facebook store inter-country friendship / chat data? If I'm in the EU and I'm friends with someone in the US, and we communicate using FB, where does that data live under this ruling? Do my transmissions to them get stored in an EU data center and their transmissions to me get stored in a US data center? Or will it be decided on something else (Who started the conversation, who initiated the friend request etc.)? Apart from the political implications of this decision, technically, how will global "social" companies decide where each piece of data is stored? Email providers like Gmail will probably just store a copy in each location (and they can claim fairly accurately that that's a side effect of the protocols being used) but real-time, centralized communications (FB chat , Google Hangouts etc.) seem to already break the logical definitions of a geographic boundary so I have no idea how the data would be logically segregated across these boundaries. Has this been discussed elsewhere? I couldn't find anything with a quick search, but I'm not sure what terms I should be searching for.