They’re not going to read them all. First off, the 650K includes Weiner’s emails which is a separate investigation.
Secondly, they will plug in searches that isolate emails Abedin used for business - state. gov, clintonemail.com, etc.
Once they know what they’re looking for, they can follow threads and or/ further isolate the pertinent emails.
Many are no doubt CC’s and BCC’s but still may be relevant.
Herridge, among others, has reported that sources told her that “explosive” information had been found by the NY investigators. The NY team has done a lot of the legwork and narrowed down what is to be looked for.
Maybe so, but attorney generals office will never convene a grand jury or indict.