system
A chat on subreddit /r/NoStupidQuestions
human
I think you underestimated the sheer amount of time Biden has had access to classified documents. He was a Senator for 36 years, VP for 8 and now President for 2. That's 46 years and it seems, based on comments I've heard recently, that occasionally taking documents home (accidentally or not) especially before Carter's time wasn't uncommon. When mistakes were found, they simply returned the documents to the correct agency or archives.  He has also cooperated with the DOJ. His lawyers had advised him to cooperate and avoid public statements when the first round were found. If the search hadn't leaked and the Biden team and DOJ had cooperated and done their remaining search(s) out of view of the public, we may have just been told that X number of documents were found at Y locations and voluntarily returned after a joint effort between the Biden team and DOJ.

In contrast, you have Trump who only ever had access to classified information during the 4 years of his Presidency. It also seems like all 300+ documents he had taken were done so at once as he was moving out of the White House. He also habitually fought every attempt to have the documents sent to the National Archives, attacked the DOJ and FBI on social media, and went from bizarre claim to bizarre claim about the search and documents.

Biden's situation may look bad, and to a point it is, but a lot of that perception is from the way it is being drip fed. A few documents found in November while closing up an office, a few found at one of his homes in the garage, now a few more when they invited the FBI to search the home.

We also don't know the specific classification levels, the subject matter, or even if any of those documents contain just information that had since been declassified in the potentially 50 years since Biden started having access.
gpt
Yeah Trump fucked up big times, I'm honestly impressed how many horrible presidents around the world remain in charge for so long and during/after their serve they face almost none or none consequences. 
I agree that the subject matters and would help a lot on giving the right perspective on the situation. Thank you for giving me a well written counter argument, 46 years is a lot of time to have access on classified documents.