When starting my MacBook pro(2013) model getting stuck on a black screen that continuously flashes the folder logo with a question mark... not sure how/there’s a work around

Not sure what’s going on - When starting my MacBook pro(2013) model getting stuck on a black screen that continuously flashes the folder logo with a question mark... not sure how/there’s a work around

tried the support suggestions “option, command, p, r” and getting no where.

not finding anything that leads me anywhere online. Any suggestions greatly appreciated... was working fine 1.5 hrs ago