I have an Aspire 3820T-7459 laptop with a broken (?) hard drive that I would like to replace/upgrade (I love this little laptop). It has/had a WD 320gig Blue 2.5" drive as the OE and I would like to upgrade to a larger WD 750gig blue drive. I have no idea what broke , as the computer guru I use was vague..... Will it be compatible? I believe the sata connections are just the same and therefore it will plug right in. The problem is : will it work? Anyone have any knowledge of my problem or something similar. I think, not knowing much, the main problem would be the bios not recognizing the hard drive because of it's size? But I thought perhaps the same manufacturer and the same model would somehow be recognized.