I have been having problems writing dvd with popcorn and realised that free space on my hard drive was disapearing i thought i had about 20 odd gig free then found i only had 10 and when i tried to write the most recent disc which failed i only had 2 left. can anyone tell me where these missing gigs are? i have tried searching my hard drive and totalling up files and now i think there is almost 40 gig hiding somewhere! I have a G4 with 128 gig hard drive. thanks