Wear leveling

Memory Cards Mobile memory, professional cards and all other st
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all modern flash devices have wear leveling. The cards you have been using however are not designed to the type of work load a pi will put on the card. sandisk supports recommendation of the high endurance cards is correct if you are looking at retail lines of cards. you could also use industrial cards as well but any support would be though the distributor where you purchased the card not sandisk retail support.