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Message: <blockquote data-quote="acolor" data-source="post: 1640267" data-attributes="member: 323278">Spec: macbook pro 13" retina(2013 late), connect with Transcent 2T external drive, OSX 10.10.2The partition of this external disk: [A]1.75T/exFAT(put my data) + 256MB/encrypted logical partition(for Time-Machine or put some data seldom used).BTW, this external drive is not connected all the time.First time after I prepare this external disk, system prompts me to enter the password for once, and I can put data to again without any password request even if system is restarted.However, the password prompt displays every time if I add/del files or folders on now. What's wrong with it?  In the 'keychain' I can find the password item for this external drive. Does this keychain item still work? Need help, thanks!ps. sorry, I go to the wrong place and should post this thread in MBP board, but I can't find the way to move there.</blockquote>