The youngster arrives from Europa and will be initially registered with Barca's Juvenil B team.
Ferrer is the son of former Barca, Spain and Chelsea fullback Albert 'Chapi' Ferrer.
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The winger originally came through Elche's system before moving onto Europa.
Ferrera starred in a youth game against Barca before Christmas and it was enough for the Blaugrana to swoop for him this week.