The German President, Joachim Gauck, concluded in an interview with the ZDF on 30.6.2013, that the NSA was not to be compared with the Stasi:

We know for example, that it is not like it was with the Stasi and the KGB – that there exist big filing cabinets in which all the content of our conversations are written down and nicely filed. This is not the case. Wir wissen zum Beispiel, dass es nicht so ist wie bei der Stasi und dem KGB, dass es dicke Aktenbände gibt, in denen unsere Gesprächsinhalte alle aufgeschrieben und schön abgeheftet sind. Das ist es nicht.

This statement is completely correct. At the NSA, conversation contents are not written down nor filed - but digitally recorded, saved and can be searched and found within seconds.