“Sansumg” is a brand that I found early on in this project. Why is “Sansumg” in quotes? Because it’s substantially similar to another well-known name brand (Samsung, in case you haven’t figured it out) — right down to duplicating Samsung’s logo and just switching the “N” and “M” around. I noticed this before I bought them — there were no surprises here.
These cards fail the criteria that I set out for determining what’s considered a name-brand card for a few reasons:
- The card comes in retail packaging, but the packaging does not identify who the vendor is who sold the card.
- As far as I can tell, this brand doesn’t sell anything other than microSD cards.
- As far as I can tell, this brand doesn’t have a website.
- The product name (in the card’s CID register) is set to
asdfg. - Surprise surprise — this card is fake flash.
And, because of the substantial similarity to Samsung’s name and logo, it does meet the criteria to be considered a knockoff — so into the knockoff bin you go!
I’ve purchased two of these cards so far. Early on in this project, my son decided he wanted to try writing his own program to do endurance testing, and I gave him one of these cards to test with. (I’ll consider that to be “sample #1”.) His program didn’t log anything, so I don’t have the exact size of the device; his program also didn’t do any performance testing, so I don’t have any performance data for that card — about all I have is the number of read/write cycles that his program was able to complete before the card stopped working.
I went back and purchased sample #2 later. I have yet to obtain sample #3 (or possibly even sample #4).
These cards bear the U3, V30, and A2 performance marks. Performance testing measurements weren’t good enough to qualify for any of them.
On the endurance testing front:
- Sample #1 completed 1,509 read/write cycles before it stopped responding to commands.
- Sample #2 has completed 11,300 read/write cycles so far and has not yet experienced any errors.
April 4, 2026 (current number of read/write cycles updates automatically every hour)