Independent forensic investigations demonstrated two years ago that the DNC emails were not hacked over the Internet, but had been copied onto an external storage device — probably a thumb drive. Additional work over recent months has yielded more evidence that the intrusion into the DNC computers was a copy, not a hack, and that it took place on May 23 and 25, 2016.
https://consortiumnews.com/2019/07/22/ray-mcgovern-a-non-hack-that-raised-hillarys-hackles/