Hardy was redshirted as a freshman at East Carolina University in 2010, a season in which he walked on. After earning a scholarship in spring 2011, he started eight of 10 games in his redshirt freshman season in 2011, recording a school freshman record 64 receptions for 658 yards and six touchdowns. As a sophomore in 2012 Hardy was an All-Conference USA first-team selection after recording 88 receptions for 1,105 yards and 11 touchdowns. As a junior in 2013, Hardy was again first-team All-Conference USA after setting school records for receptions (114) and receiving yards (1,284) in a season. During the first game of his senior season in 2014, he set East Carolina's record for career receptions, passing Dwayne Harris' 268. On November 22, 2014, against Tulane, Hardy became the NCAA's all-time leading receptions leader, passing Ryan Broyles' 349. On December 8, 2014, Hardy was named the winner of that season's Burlsworth Trophy, awarded annually to the most outstanding player who began his college career as a walk-on. For the season, Hardy had 121 receptions for 1,494 yards and 10 touchdowns.