Read then FBI Director James Comey's own words:
In an otherwise harshly critical assessment in which he condemned Clinton’s email practices as “extremely careless,” then-FBI Director James Comey announced that investigators had found no clear evidence that Clinton or her aides had intended to break laws governing classified information.
As a result, he said, “no reasonable prosecutor” would move forward with a case. The relevant Espionage Act cases brought by the Justice Department over the past century, Comey said, all involved factors including efforts to obstruct justice, willful mishandling of classified documents and indications of disloyalty to the U.S. None of those factors existed in the Clinton investigation, he said.
And he had access to MUCH MORE evidence than you.