I am getting very very frustrated here. I am trying to partition 10GB on my external HD, that's all.. I need to mount something to be used during boot menu. THe only problem is that when I click partition, it gets stuck on modifying partition map. The external HD is 600GB, with 120GB free.. and NO I don't have another one and NO i'm not going to buy another one. PLease help me before I break ****.