Ok i as planning to sell my macbook in the near future and i wanted to back up everything to my external hard drive. I heard of offsite backup but i didn't plan on doing it yet. Anyways i used time machine to make my external hard drive to be my backup disk. First i had to take everything off it (80GBs worth of music, movies and documents) and i put it on the desktop cuz Time Machine said something about incompatibility and i had to erase my external drive first. I then backed up at least 120GB of content altogether to the external hard drive. I checked my external drive and found out the stuff i took out and put on the desktop was NOT backed up. So i deleted the backup and put the 80GB of movies, music, etc stuff in a folder in my computer. However i can't back up to my external drive anymore. It says it only has 61.28GB of memory left. I'm wondering why is that if i deleted the backup already! I then tried to take the backup out of the trash and put it back in the external drive and it won't go in because there is only 62.28GB of memory. I don't see any partition of any sort on my external drive, no folders, files or anything yet it has magically lost 190GB of free storage. Can someone give me advice?! Thanks!