I am backing up my MBA onto an external drive via my AEBS. I am also backing up another external drive to the same target by attaching it to my MBA when I need to perform a backup. With the TM Backup disk mounted via the AEBS, I can go into it and see what has been backed up. However, when I start to delve into the folders on my MBA's backups I see all the folders have the small arrow in the corner showing that these are shortcuts. I can't get into the folders. However when I physically plug the drive in to my MBA, all the folders act as normal. Why is this? Also, I cannot seem to backup to the TM drive without plugging it in directly, although I have managed to backup to it before wirelessly.