You have no evidence for what you are claiming.
Thanks for demonstrating that your claims are baseless. You could be suspicious of the DNC hanging on to their server, but the FBI could still compare the copy to the network which has been up and running the entire time and they also have evidence from 2015, over a year before the DNC leak.
That is simple logic. You never just have one piece of evidence. That’s how it works in movies. I’m sure you thought you had a really compelling argument.