@Banekk04 Not Authentic.
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This resource has a lot of errors, but it shows the “Date Code on the product”:
https://support-en.sandisk.com/app/answers/detailweb/a_id/53002
YWWDMTLLLXXX
CC MADE IN ORIGIN
From my previous research:
Y = last digit of year
WW = week
D = day of week ?
M = ?
T = ?
LLL = manufacture location / contractor ???
XXX = technology code
CC = capacity code
Your “date code” appears to be “9531YXDAG0AT”.
Week 53 seems odd, unless it’s a partial week at the very end of the year.
The date code is saying that your card was manufactured on day 1 of week 53 in 2019.
Using Google Images, most of the “Made In China” cards have an M code of “D”. I’m wondering whether M codes for the manufacture location rather than LLL. I didn’t find any card where M = “Y”, as in your case.
Some marking info here:
https://datasheet.octopart.com/SDSDQAB-004G-SanDisk-datasheet-62099552.pdf
