Authorities say the New York resident was arrested on Friday after victims utilized Apple’s Find My iPhone feature.

It’s unclear how Henao managed to swipe so many devices, but officers say when they tracked him down, he was carrying a backpack filled with the stolen merchandise. A picture was shared by authorities that shows a table filled with the recovered smartphones.

Smartphone theft has gone down thanks to security features like Find My iPhone, something Henao apparently didn’t take into account.

According to KMIR, several of the devices have already been returned to their owners, though some remain unaccounted for at the festival’s lost and found.

Let this be a warning to attendees: If you attend the festival this upcoming weekend, be aware of where you put your device.