Is this SSD fake or defective?

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I bought a SSD Samsung Evo 1 TB for 2,500 from Lazada. When I got my SSD a friend told me I got it for a very cheap price (I'm not aware of current SSD price). I had it checked with a H2testw and the testing time started from 17mins and it slowly turned to over 3 hours. I plan to return it, I just need more explanation in case seller challenged my findings.

BTW Samsung Magician recognized the SSD as 1TB, it is running in the background. Thanks for the help. I'm not very techie so any info would be appreciated.