Nano Memory will replace microSD, at least for the HUAWEI Mate 20 series
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Amazon.com: JJC Huawei Nano Memory NM Card Reader Writer, USB 3.0 USB-C Type-C to NM Nano Memory SD MicroSD Card, Data Transfer Speed up to 90MB/S for Huawei Smartphone and Laptop :
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What is Nano Memory and where is it headed? - Android Authority