The FBI report on Hillary's email
If you read the entire report, you'll find bits and pieces that might show poor judgment on Hillary's part. The initial decision to use one email device is the obvious one, something that Hillary has acknowledged repeatedly.
Another—maybe—is her staff's view of what was safe to send over unclassified email. But this is very fuzzy. It could be that her staff knew exactly what it was doing, and it's the subsequent classification authorities who are wrong. This is something that it's impossible to judge since none of us will ever see the emails in question.
That said, this report is pretty much an almost complete exoneration of Hillary Clinton. She wasn't prohibited from using a personal device or a personal email account, and others at state did it routinely. She's told the truth all along about why she did it.
Colin Powell did indeed advise her about using personal email shortly after she took office, but she chose to follow the rules rather than skirt them, as Powell did. She didn't take her BlackBerry into her office. She communicated with only a very select group of 13 people.
She took no part in deciding which emails were personal before handing them over to State. She had nothing to do with erasing information on the PRN server. That was a screw-up on PRN's end. She and her staff all believed at the time that they were careful not to conduct sensitive conversations over unclassified email systems. And there's no evidence that her server was ever hacked...
Hillary is like most of us who use computers: She struggled to learn enough about the technology and the devices she used to do her job. She of course relied on others to set up her system. Unlike the rest of us, she and her staff had to also struggle with the government's baroque technology and classification system.