On the Transcend website, you can register the card (as well as other harware manufacturer) by serial number. This is very straightforward and without entering a vast amount of personal data or then to get advertising. In return, you will receive a 30 year warranty for the SD card. I'm very satisfied with the purchase and the performance of the cards and see no need to pay considerably more for other brands. In the past I've used other cards from Transcend and had good experiences with it exclusively, even with CF. Had the same time comparable SanDisk cards in use and was never able to notice a difference in terms of quality, reliability or performance. Transcend cards always had a marginally higher data capacity. With the current experience, I can absolutely recommend the cards.
Have the newly purchased card in the card reader with the free tool: SD Formatter, of [...] formatted with the Full Overwrite option and thereby each cell also described. Even here, everything was perfect, each of the 3 cards the same size and almost identical in CrystalDiskMark.