I bought this and am very satisfied. The actual device is less than 2.5 inches, so be careful not to drill too big a hole. Tape the edges with tape to hold the grommet in place. All functions work. USB 3.0 microSD and regular SD. I tested with a large capacity of 128GB and it worked fine. USB ports can be a bit stiff at first. You will receive a power adapter to charge your device with it. It's not fast charging.
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