Not too bad. I use this in a Ridge wallet and it's holding up well (I haven't dropped it). SD card and micro SD cards are suitable, but! I recommend changing the ledge you have to press to pop it out. I simply shaved them off with tools and smoothed them out for easy loading and unloading. I'd recommend rethinking the design to address the criticism most of us have of it. As a user, I DO NOT RECOMMEND linking this (just my opinion), it works great when protected.
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