Seagate 100GB Hard Drive for notebook SMART...

Question

I bought a Seagate 100GB hard drive at Best Buy in Mansfield, TX. I paid the Geek squad over $500.00 to put a new hard drive and now two yrs later the computer says: SMART failure predicted on Hard Disk 0:ST9100824A-(PM)Warning: Immediately back up your data and replace your hard disk drive. A failure may be imminent. Press F1 to continue What can you do to help me? I can not afford another $500.00