This is the first 4-in-1 reader that actually works on my iphone (lightning connector), on my ipad (usb-c) and my android phone (usb-c) as well as on my computer (usb-a).
Read/write speed is limited to below usb2 though (18 mb/s) - so it might not be perfect to transfer huge files.
Same micro-sd card in my other usb3 reader writes with 70 mb/s and reads with 86mb/s.
But for exchange with mobiles i like it.
