How many albums did the knack sell?

The Knack, best known for their hit "My Sharona," achieved significant commercial success in the late 1970s. Their debut album, "Get the Knack," sold over 3 million copies in the U.S. alone. In total, the band released several albums, but specific sales figures for all their albums combined are less commonly detailed. Overall, their impact on pop rock during that era remains notable.