How can I choose the right hard drive for my laptop?

Benjamin August 16, 2012
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I want to buy a new harddrive for my laptop.
1. What are the things I need to look out for, as in, the criteria that I have to match to be sure it’ll work, when ordering sth. off the internet?
The OEM’s product page (http://support.acer.com/acerpanam/notebook/2011/Acer/TravelMate/TravelMate8172Z/TravelMate8172Zsp2.shtml) actually doesn’t give me a lot of information.
Is it enough for it to be a 2,5″ with SATA and it’ll fit/work? I heard there are different *build heights* etc. to consider…
2. Once I’m sure a given hdd will work in my laptop, what about performance criteria: What about buffer, spin speed, seek time? Is it worth the money going for above average specs, or won’t I even notice the difference?

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