Ok so time machine was backing up, i plugged in my logitech keyboard into my macbook, which caused it to kernel panic (hate logitech). So restarted my macbook and manually invoked a backup on time machine. Get an error message saying that time machine needs 137625GB of space and that my External HD volume is too small for that backup. I've attached a screenshot of this in case you think i'm lying!! What am i supposed to do now?? This is so bizarre!!