thanks for the replies. i've closed the program on 32 weeks for now. the size of block folder (%appdata%\Bitcoin\blocks) is 5.32 GB, but i'm sure it has used more than 15 GB of internet traffic. where has the rest of it gone?! please don't tell me to check my firewall or other app usage, i know it for certain! is there something like "wasted" in Bittorent?