? about a hard drive

[EVOEvo]

i bought i 160 gig hard drive off ebay for 120$ shiped its a 7200 rpm i payed the guy and stuff then about 3 days later he said he bumb his table and the hard drive hit the floor and broke so he said he would send it off with a RMA and get me another which would take 2 weeks or he could ship me a faster one that he had so i told him to ship the faster one well i got it today it shows on the stats to be 160 gb but when i installed it it only shows 127 gb i dont know if he switched them or if its the way its fomatted and i know it should have at least 156 gb with a full formatt im loseing like 30 gigs i dont know if the buyer got over on me or what and i payed useing a money order cause he did not accept paypal with uncofrimed address so i guess i will take my losses and stick with what i have i got this 127 gb and also a 80 gb so this gives me alot of space i like to put my ps2 games on the hd and i dont have to read them ever time i need to make a backup