upgrading hd in toshiba laptop

  alltime 18:52 17 Jun 2005

Hi guys, I would like to upgrade the hard drive in my Toshiba A30 laptop from 30gb to possibly 60 or 80gb.The processor is a p4 2.8ghz with 512ram.
The present disk is a Hitachi Travelstar Pt no 08k0910. 4200rpm.
1/ Can this laptop be upgraded safely?
2/ will the Phoenix bios cope being upgraded?
3/If this is possible and i replaced the existing hd with another Hitachi travelstar, Is there a particular Part no i would have to look for, for compatability purposes, and would a speed advantage to 5400 or 7500 give me a vast improvement.

  alltime 17:11 20 Jun 2005

Have we not got any laptop specialists on the site who could give advise

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