Flo is best remembered for his time at Bramall Lane and two particular games stick in his mind from the Blades' Premiership days.
"I've always hated Liverpool and scored both goals against them at Anfield [United beat Liverpool 2-1 in 1994]."
The same season saw Flo net as United drew 2-2 with Leeds United and he went on to finish the campaign with nine goals from 32 appearances.
"It was very special scoring against a club I've supported for 15 years," he added.
The Blades were relegated from the top flight and Flo played his last game for them in December 1995 after scoring 19 goals in 74 games for the club.
"I've never won anything, but I'm rich in experiences," he continued. "I've never been the best striker around but most don't like playing against me," he told Aftenposten. "Now it's time to call it a day and I'm actually quite fed up with football.
"I hope I can quit in peace and quiet, just like it was when I came here [to Stromsgodset], with only one reporter present at the press conference."