This applies to a Samsung Micro SDXC xGB EVO Memory Card that I recently purchased (and probably a wider range of similar Samsung cards). Despite a long search, I couldn’t find any information (even on Samsung.com) about which of the tiny sets of numbers and letters on the back of the card constituted the serial number.
I’ve finally figured it all out. On the back of the card, there are 4 lines of information. From top to bottom as it relates to the sample image:
Line 1 is the Model Number > MB-MP32D (the 32 signifies 32 GB, in this case)
Line 2 is the Lot ID > MBMPBGVEQBFW-B
Line 3 is the Serial Number > DHTA410GG407
Line 4 is the Country of Manufacture > MADE IN KOREA
EDIT: Based on a comment posted by KK, MAY 18, 2017 AT 1:10 PM, I’ve reviewed the product packaging. KK was advised by Samsung Canada Customer Support that the serial number is not on the memory card and is, instead, on the product packaging. I happen to still have the replacement card that Samsung provided under warranty in the original packaging. Unfortunately for this agent at Samsung Canada support, there is no evidence of a serial number anywhere on the outside of the packaging. Upon opening the blister pack, I found no numbers on the inside of the packaging, either.
port1352 
Thank you. I have been searching for an hour just to find out which line was the serial number! Great work!
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Thank you! One question though: how did you confirm that the third line is actually the serial number?
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I confirmed the third line was the serial number when I contacted Samsung support for a warranty issue.
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I contacted Samsung Canada support for a warranty issue and was told the number on the 3rd line wasn’t serial number.
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Which one did Canada support indicate was the number?
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They didn’t identify ANY of the 3 numbers as serial numbers, said it must have been on the package, which is super weird.
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