Haha happened to me at my old work. Brand spanking Sandisk, some kind of pro card. We ordered like 5 of them so it wasn't a big deal so it was just to ask the distributor for a new card and they sent it right away.hah me too that why iam so confused but all of this for sure they can lock themselves on read only even perfectly new one thats why iam avoiding patriot micro sd :
The teacher was like "But it's brand new!". I didn't want to entertain a old person not understanding that mass produced products can break before use because of <reasons>...