When The New York Post first reported in 2020 about a laptop once used by Hunter Biden — which the paper said contained incriminating evidence against him and his father, Joseph R. Biden Jr., who was running for president — it set off a firestorm.

Many national news outlets raised questions about the existence of the laptop and the claims about its contents, while major social media platforms limited posts about The Post’s coverage. Conservatives said those reactions were evidence of liberal censorship.

Many of the claims made by The Post in its coverage of the laptop, in which the publication sought to link President Biden to corrupt business dealings, have not been proved. But the laptop had enough incriminating evidence to continue to haunt Hunter Biden.

The laptop and some of its contents played a visible role in federal prosecutors’ case against the president’s son, who was charged with lying on a firearm application in 2018 by not disclosing his drug use. A prosecutor briefly held up the laptop before the jury in Delaware, and an F.B.I. agent later testified that messages and photos on it and in personal data that Mr. Biden had saved in cloud computing servers had made his drug use clear.

On Tuesday, the jury found Mr. Biden, 54, guilty of three felony charges. He will be sentenced at later date.