Western Digital My Book 3TB hdd eats my data!

[c2herr]

I have a WD My Book 3TB external hdd that I bought to store movies on. I moved several movies onto the drive and all was good. Then I went to play one of the movies and it was very blocky/distorted/mosaic/etc and skipped. I checked the movie file and a few large chunks of it were missing. No longer there at all. I reformatted the drive and checked for bad sectors. All checked out. Moved a few movies over to it to store once again. Same thing happened. The movies played fine until I got to one of the areas where the data had disappeared and it got blocky/distorted, etc.

I checked to see if there were any magnetic fields where the drive was that would maybe be erasing the data (although, that would mean the drive has some weak shielding). I didn't find anything. So, I thought maybe the drive was defective. I returned it to WD and they sent a replacement. Moved movies over to it. Same thing.

I have a Seagate drive with half the capacity that has no issues in the same physical location. I tried moving the WD drive to a different location just in case. Still does it. I have no idea what is causing this, but it's very irritating. I bought the drive to reduce my DVD/Blu-Ray clutter, but it's so unreliable, that I can't get rid of my physical movies because they will be lost by the drive! Help?!

 

[hang-the-9]

You're saying you copy the same files over to the Seagate and it works fine? Or other files work fine but not the same ones?
Are actual files missing with no errors in the file copy?