Startup disk not found
Hi please can someone help me. My computer froze and when I restarted it I was given a folder with a question mark. I have done all the different reboots but nothing is working. When pressing “command R” and do a internet reboot I have found the error. My startup disk cannot be found. It is as though my MacBook cannot find its hard drive. I am not sure what to do or how to fix this.
MacBook Air 13″, macOS 11.1