I already read it...the whole thing actually...and YOU still don’t get what he means by other agencies and archived documents.
The EO says that he will consult with the Archivist (of NARA), the Attorney General (of the U.S.) and “other such executive agencies” in order to determine whether or not invoking executive privilege is appropriate. It doesn’t say that those presidential records reside at those “other such agencies.”
Furthermore, it refers to executive agencies, meaning those under federal authority, not state agencies such as the Hawaii Department of Health, which is the only agency that maintains a copy of Obama’s BC.
Additionally, the Presidential Records Act dictates what presidential records are archived at NARA. It doesn’t dictate what records, presidential or otherwise, are archived by state agencies.
It is you who doesn’t understand the meaning of “other such agencies” or “archived.” Apparently you also don’t understand the nature of federal versus state agencies.