It's illegal but it's only a misdemeanor and this judge is charging Trump with a felony. It is an extremely weak case by a judge who is grasping at straws to put Trump in prison. This case is far more about politics than the law.
Not to mention we have Hillary and Biden walking freely even though they both has multiple classified documents in unsecured locations. That is a felony.
If you so concerned about justice then why aren't you concerned about Hillary or Biden?
Democrats are constantly violating the constitution. Why isn't a single Democrat the slightest bit concerned. Where were the Democrats when Roe v Wade was adjudicated. That was a gross violation of the constitution. Judges are forbidden to make law. The same applies to the marriage "legislation" that came from the courts.
Presidents are forbidden from making laws also but Obama opened that door with executive order. Unfortunately Trump kept that door wide open. So has Biden.