FORMAT 64GB MICRO SDXC PROBLEM

Memory Cards Mobile memory, professional cards and all other st
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I have 8 of these cards (64Gb and 32Gb) which cost us over £300, and after a few months of service, none of them work. We are asked to reformat, but only 30.6Mb is shown as memory, and then neither Windows nor Mac can format any of them. They are within warranty, and I hope that SanDisk will honour the warranty. So far, they have sent me a reply asking for a lot of information about each card, much of which is hardly visible. Let’s see what happens, but they do seem to have a quality problem with their cards.