How do i fix the Cyclic Redundancy Check error on my External Back Up Hard Drive

I have an External hard disk but it seem there is a Data Error (Cyclic Redundancy). My Files in this Ext. Hard Disk are mostly important work related matters. Its a 500GB HD.

Can you please assist me?

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More about cyclic redundancy check error external back hard drive
  1. To avoid an "O crap", I would suggest contacting the vendor. They will be able to assist you the best since they developed it.

    I hesitate giving advice in this situation b/c there is important data involved.
  2. You need to initiate a data recovery operation. The first step is to try and take an image of your failing drive. Then attempt to recover your data from the image.
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