The 26-year old joined the Grecians in August 2013 and last season scored 21 goals in 46 appearances.
Exeter City manager Paul Tisdale said he was proud of the progress David had made during his time at the club and wished him all the best for the future.
It's not known how much the Championship side have paid.
Students connect with elderly residents to combat loneliness
International students creating lasting friendships
Crackdown on anti-social behaviour in Plymouth
PSPOs proposed for six city centre car parks
£1.6 million for more energy efficiency Devon home upgrades
41 properties improved over last year
SWW to build huge new Churston solar farm
Council could opt out of building and lease the land instead
MP highlights Devon's dentistry 'crisis'
'People are in pain but are unable to access treatment'
Work on ‘once-in-a-generation’ Newton Abbot project back on track
'Newton Abbot is a fantastic place'
