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Is it possible to change the standard 40gig to something bigger?

If so how, and does it void the warranty?

Yes it can be done and a reasonably intelligent Internet search will find info on this.
You would indeed void your warranty, of course.

Chris Muriel

What Satellite published a "how to" feature on upgrading your HDD.I would think its still available in back issues.
Other forums report upgrades to 120Gb.Warranty void without doubt,but the percentage reading ignores the higher capacity ,telling you only for 40Gb,but the bar underneath ,apparently,reads correctly for the bigger disc.