Not sure where to post this, but I have Macbook so I'll leave it here. It was awhile back when I purchased a larger 500 GB hard drive (Western Digital I believe) to replace the smaller capacity HDD. To boot I did notice the HDD had a 500 GB total capacity, but later on I did a fresh install and it reduced it to 465 GB. Why would this happen? Could it have something to do with the erase security option I chose (Zero Out Data)? Thanks!