Macbook pro 10.6 Copying larger files to external

I'm stuck. I am trying to copy MOV and MTS files from one hard drive to another. I keep getting an error message. Here are the facts:
Macbook Pro
OS 10.6.8
Hitachi hard drive 2tb
Copying MOV and MTS files
Hitachi has been formatted many times to Mac OS extended (journaled). One time I even tried creating 1 partition with the same.
I am dragging and dropping the files
I am able to move smaller files (pdf, doc, ai) up to about 50mb with no problem.
After a file results in an error it is impossible to copy anything else to the drive no matter how small
Also, the Hitachi will not eject after and I have to unplug it to get it off line.
I was able to plug in another drive I have here (different brand) and copy everything I wanted to that but I need another dedicated backup of the files.
I spent quite a bit of time reading on similar problems and practically everyone has a problem because they are formatted in FAT32. That is not the case here. What am I doing wrong? Is there a way to find out if there is something wrong with this drive?

kwmlr439 wrote:
CSOUND Read the title please:
Re: Macbook Pro 10.6.8 RAM Upgarde to 8 GB
The amount of RAM is not dependant on the operating system. It is all about the model of you Mac.
10.6.8 is the version of OS X that is installed on your system. It has no real baring on the amount of RAM that CAN be installed.
Personally I have never had good luck with Corsair RAM. I have always had good luck with Crucial and Kingston.
Message was edited by: Shootist007
Message was edited by: Shootist007

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yesterday, may boss, ordered some people to check the cabling and connections in our network.
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Greetings,
peter.

Macbook pro 10.6 Copying larger files to external

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