Smith said: “Matty’s doing a good job for us at the moment but we know his best years are still to come. I think he’ll really kick on and shine in the following seasons.
“I’m looking forward to working with Matty for the next three and a half years.”
Storton said: “I’m over the moon. It was a no-brainer really when I got approached by the club to sign the extension – I snapped their hand off.
“All the coaching staff believe in me. It was an easy decision. I’m learning from a lot of good players at the club and they’re all hitting their primes – so I’m learning from the best really.”
Last week, the Robins also announced that half-back Rowan Milnes signed a three-year extension with the club.
The 21-year-old made his Super League debut last October against Catalans. He has made 10 appearances for the club so far.
Smith said: “Delighted for Rowan, but the club as well. He’s a talented young, half-back – one we feel has got a really bright future. He’s doing some good things along the way and gaining some great experiences at the moment. I’d also like to think he’s getting better and better.”
“It was an easy decision. I love it here – love the culture, the lads, the coaching staff. I want to keep going in the direction I’m going in and nail down that regular half spot.”