Is this normal?

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http://forum.xda-developers.com – I recently had my 1 tb hdd on my sony laptop replaced with a 180 gig ssd. I let best buy do the switch because it was free and I figured why not. When I got it back with a clean install on the ssd there is only 95 gigs free. The c drive says 95 free out of 129 total. I knew I wouldn't get the whole 180 but why only 129? Just wondered if this is normal or not as this is my first ssd. (HowTos)