How to move movies onto phone?

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http://androidforums.com – I recently purchased my HTC Sensation 4G from TMobile. I also bought my first DVD Digital Copy and want to add the movie over from my PC to my phone. I know how to connect and gain access to the phone storage but every time I try to copy the movie from the copy over the phone it said that the drive is full. I have an 8GB Kingston Micro SD HC card installed. What am I doing wrong? Am I to store it in a certain location? Is this SD card already filled up? (General)