Thanks. I just swapped to a SanDisk USB-C 64Gb. It's formatted Ex-FAT and contains 3 folders and a few hundred files. So far, it works fine. I missed that small stick on Amazon, so I'll have to pick one up. It's handier than mine. I'll have to try again, but I thought that only the left port supported data. All the ports are marked as charging/power
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