[HELP] Format My External Hard Drive [HELP]

Hi !
I have a External Hard Drive. I formated it on my PC.And I can only read it on my MAC,can't write.
So I want to format it on my MAC.
Can U tell me HOW ?
and How can I after format it, then use it on both of PC and MAC.(Read&Write).
Thanks !

choose "Disk Utility" , and then.................... ?
Select the drive in the list to the left, click on the Erase tab, pick a format, and click the Erase button. You should use MS-DOS if you need to access the drive on a PC and Mac OS Extended with or without journaling otherwise. Turning on journaling can increase the chance of recovering data lost from the drive in the future. Journaling can be turned on and off without erasing the disk again.
(13320)

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