Swindon have taken up contract options on four first-team players ahead of Saturday's notice of contract deadline.
Portsmouth have agreed a deal to sign Swindon defender Joe Devera on a contract until the end of the 2014/15 season.
Swindon defender Joe Devera is one of five players who will not be offered a new deal by the club.
Swindon captain Alan McCormack has praised Miles Storey for standing up to be counted in Monday's defeat against Brentford.
Kevin MacDonald believes the dismissal of Nathan Byrne ultimately sealed Swindon's fate in the second leg of their League One play-off clash with Brentford.
Brentford beat Swindon on penalties after a thrilling 3-3 draw at Griffin Park to reach the League One play-off final.
Kevin MacDonald believes it is too hard to call the second leg of Swindon's League One play-off semi-final with Brentford.
Tony Craig returns from suspension for Brentford's play-off semi-final second leg against Swindon on Monday (4.30pm).