I bought an external 2tra western HDD has a USB 2.0 port .It was working fine with the USB 2.0 connection. I could copy, delete, write files onto the drive. When I used the eSATA port I get the "Disk is Write Protected" warning. and my hard's kit is broken .now i have very importent thing in my hard and i cant use it and i use another kit or hard box for use it but all of them say "Disk is Write Protected" warning
What OS are you running on your desktop computer, and when you used the eSATA conection, did you use that on a different computer, or one running Win XP, or an Apple?
Also with the ext drive connected, go to Disk Management, and upload a screenshot (imageshack or photobucket) with your post back, so we can see exactly now Windows recognizes this WD 2TB external drive.