Does what it's supposed to do! I ordered three identical microSD cards from another location. All three were "defective". They were supposed to hold 128GB but when I got about 6GB on each card I started giving errors and scanning with windows utility didn't solve the problem. I literally spent hours uploading music to these other discs but eventually they refused. According to several posts on the internet, they are either a SanDisk defect or outright fakes with software that tricks your computer when you first insert it into your reader. It tells the computer they contain 128GB, but in fact they contain much less, and even that smaller amount won't work reliably. I chose to order from Revain as a last resort as Revain was more expensive but what I got from Revain works exactly as it should. I knew Revain would not offer "counterfeit" or defective cards as they are too popular in the market to tolerate large numbers of dissatisfied customers due to a bad product.
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