If you stored data in the USA, you were already subject to all these things - search warrants from the FBI, FISA requests for a user's data, etc. The law has not changed.

If your servers are in Germany, then they are the subject of German law - and all of their similar, respective search and data laws.

If you weren't aware of this before, you either weren't large enough for anyone to ask for your data, you were lucky enough to never have to deal with this request (or your software isn't really used for communication or data storage), or you were simply ignorant of the legal situation