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After few hours of data transfer ( I found corrupted files, luckily I’ve backups ), Pending Sector Count has increased from 1584 to 3952. I decided to do full formatting in order to force the hard drive to check bad sectors. Now, the drive has 196 reallocated sectors. And the smart checkers are red blinking… This new drive seems long term unreliable to store sensible files… so I decided to send it back while I can and order something else.