Problems with SD cards Galaxy s4 mini

A

AC Question

A few months ago I bought a 32GB SD card and it worked fine for a while but one day my Galaxy s4 mini showed the error "blank SD card". I tried opening it on the computer but it didn't work. Luckily I had backed up most of my files so not much damage was done and I assumed it was just a faulty card. So then I took another card (which was previously in another phone and worked fine there) and after less than a month the same thing happened again. The card seems to be corrupt again. Both of the cards were high-quality, not some cheap cards from eBay.
Am I just incredibly unlucky with SD cards or could this be a phone problem?
 

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