Bought for my iPad Pro 2018, I was able to test with SD cards from my camera a few months after purchase, I used a Canon SD card (SDC-32m) and Transcend SD-HC 4GB card for review - they don't work with the iPad. The Sandisk card reader is said to light up when it's reading an SD card when connected to an iPad Pro, and it doesn't like power outages. Tested on iOS 12 and iPad OS. Don't buy it if you plan to use it with an iPad Pro.
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