We recently discovered that the files reveal a FAT (File Allocation Table) system property. This shows that the data had been transferred to an external storage device, such as a thumb drive, before WikiLeaks posted them.
FAT is a simple file system named for its method of organization, the File Allocation Table. It is used for storage only and is not related to internet transfers like hacking. Were WikiLeaks to have received the DNC files via a hack, the last modified times on the files would be a random mixture of odd-and even-ending numbers.
Why is that important? The evidence lies in the “last modified” time stamps on the Wikileaks files. When a file is stored under the FAT file system the software rounds the time to the nearest even-numbered second. Every single one of the time stamps in the DNC files on WikiLeaks’ site ends in an even number.