$314.$ A technician receives a help desk ticket from a user who is unable to update a phone. The technician investigates the issue and notices the following error message: Insufficient storage space While analyzing the phone, the technician does not discover any third$-$party' applications or photos. Which of the following is the best way to resolve the issue?

A$.$ Exchange the device for a newer one.

B$.$ Upgrade the onboard storage

C$.$ Allocate more space by removing factory applications

D$.$ Move factory applications to external memory.