Computer experts: SMART Failure Predicted, press F1 to continue but it doesn't continue?

Upon starting up my HP notebook, there was this message SMART Failure Predicted on Hard Disk 4 WARNING: Immediately back-up your data and replace your hard disk drives. A failure may be imminent. Press F1 to Continue But when I press F1 nothing happens What can I do to continue start up so I can back up... show more Upon starting up my HP notebook, there was this message

SMART Failure Predicted on Hard Disk 4

WARNING: Immediately back-up your data and replace your hard disk drives. A failure may be imminent.
Press F1 to Continue

But when I press F1 nothing happens
What can I do to continue start up so I can back up my files??

Please help :(
Update: the main problem isn't that i need to replace the hard drive... i already know that

i need to be about to continue start up to BACK UP data

i have a few gigabytes of music i have collected over the years, my photography and the updated copy of my novel i'm writing
so this is very distressing :(
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