My computer asus is sayin reboot and select proper boot device

Sounds like the HDD die. If you haven't make a backup disk, then sorry, you lost your data. You need to get professional data retrieval.

Get ASUS to swap out the HDD, you are still under warranty.

ASUS don't provide data recovery and they have to take your old HDD back to Seagate to claim a new HDD for your warranty. So, before sending it ASUS, ask them what procedure you need to get the old HDD back so you can send it to the data recovery.

OK. Before you send the laptop away, pull the hard drive and cable it up to a desktop system. You may be able to copy your data onto the desktop system.

^forgot that step.

Although I think the HDD is truly dead. I think ASUS is getting some of the worst HDD from Seagate.

Had the HDD on an ASUS die on me shortly after purchase and the replacement I have now as a seconadry HDD along with the SSD is on the way out (screeching noise). Just hope that it will last long enough until HDD price goes down. Don't worry about me, I have everything back up in triple redundancy.

Thank you it was still under warranty. I tried to recover it with my desk top put it did not work. ;-( its ok now i know... I am going to get an external drive to back up everything. Thanks !