Bardsley, 22 has joined the Bramall Lane club on a months loan after failing to find a way into the Red Devils first team; he has played just once for the Old Trafford club in the Carling Cup defeat to Coventry City.
The full-back was eager to make a permanent move away from Old Trafford in the summer but this was squashed when no club made a bid.
He spent the majority of last season on loan at Aston Villa where he teamed up with Gary Cahill and Lee Hendrie who are both presentably at Sheffield United; Cahill is on loan from the Birmingham club.