I've been using the Tiger backup App, and need some advice. The Full backup of the Home folder was 15 GB. No problem. The incremental weekly backups started quite high, up to 5 GB. After four months the weekly incrementals are under 50 MB. I'm not adding this much new data to the HD, so why is the app filling up the external drive like this? In four months the backup folder has grown to over 50 GB.