I think I got lucky with memory cards

[Bad Santa]

When I was playing with my drone, it kept saying something about my memory card being too slow.
Not a huge surprise because my cards were top-of-the- line when I got them a few years ago. They were all class 10. Bought them for my GoPro.
Well, I found out that DJI recommends U3/V30 cards so I went to buy some.
I went to aliexpress to order some. (Don't shame me)
They had San Disk (best brand) clones (San Diam) 256Gb for $3.44 each so I ordered 4 of them.
San Disk, same specs, were $25 each.

I watched some videos comparing the cards and it turns out the clones have a 50% defect rate. I was kind of bummed but figured I'd run tests on them to make sure they were good.
Even if only one of the cards checked out it was still a savings and I could use the others for transferring files.

Well....

They accidentally sent me genuine 256Gb San Disk memory cards with the same U3/V30 specs.

So $100 worth of cards for $16.

Probably used up all my luck for the year.

 

[VenomXts]

I'd test fill one up and check personally, I love cheap but nothing has pissed me off more than losing a photoshoot to a defective card or having one up in the air when i am trying to shoot. And anything coming from aliexpress has a possibility to be counterfeit.