i have a western digital 80g hard drive i installed a month agog, works great but now i noticed that when i click on it and go to get info it says its only a 32g with 19 used and 13 available. i went to disk utility and it says its a 74g and i also verified permissions, also disk utility says its a 74g. when i open the activity monitor it says its only a 32g. i checked to see if i had some how partitioned it but nothing. what am i missing.