Amad says Sunderland are "the best team" for him to continue his progression away from Manchester United.
The winger completed a move to the Championship side this week, and will stay at the Stadium of Light for the remainder of the campaign. It is thought the Wearsiders, who have unveiled Tony Mowbray as their new manager, beat off plenty of competition for the youngster's signature.
The 20-year-old is embarking on his second stint away from Old Trafford after spending the second half of last term at Rangers. Speaking to Sunderland's website, Amad said: "I feel good and very positive about this opportunity, so I’m happy to be here.