Not the end of the world, but each backup file is getting larger. I only keep the latest backup file, which is currently 1.2 GB. I'm assuming it's all of the thumbnails adding up as new material comes out? I don't really have a glut of add-ons (and do not store videos/pics on my flash drive as it is only an 8GB'er) so I'm not sure what else it could be. Is it worth dumping thumbnail files?