For those wondering why this has to be carefully done dropped my over time consider this:
A. Fruit of the poison tree. If procedure is not followed prosecutions may not proceed. Although UCMJ is another ball of wax.
B. xkeyscore and prism, while leaked (and not officially confirmed), remain critical capabilities of No Such/DIA/MIL. When WL dumped emails recall how the MSM focused on how they were obtained, refused to verify, did not focus at all on the content. Imagine the volume when they know e-v-e-r-y-t-h-i-n-g is recorded in place.
C. FBI likely wiped well before discovery. Of course this opens up a retroactive subpoena opportunity through FISA for No Such data which is why Trump reauthorized (also why 40/60 as FISA is CLAS). They already know this will lead deep into the rabbit hole eventually to the Mad Queen of Hearts who wants to watch the world burn for her pleasure and settles matters with violent decrees.
From what I gather, all this is already done and is ready for accelerated disclosure. Hold on to your butts!