Using the same drive for Time Machine backups and iTunes library, I'd like to manually control the size of the backups. But I just realized that manually removing backups (either full backups or individual files) from within Time Machine doesn't seem to affect the size of the backup file. It's mainly the iPhoto library that disturbs me. My library is just over 40 GB right now, and having backups weighing in at 40, 35, 30 etc (you probably catch my drift) when the only version I'd ever be interested in is the most recent one just feels like an enormous waste of space. If I delete an old backup in Time Machine, I can no longer access it in Time Machine - but the files are still there in the backup file (the mounted Time Machine file)... How do I solve this issue without having to remove the whole backup and do a full backup from the beginning?