It has been awhile since I done one of these MUST HAVE gadget reviews. This mini microSD reader with built-in OTG support is just that!!!
First of all, let me start with that it cost only $7 shipped!!! The gadget is very small, together with micro-USB connector the dimensions are 38.9mm x 20.6mm x 8mm and only 3.4g, where once plugged into your phone or tablet it will extend by only 26mm. It accepts microSD, microSDHC, and microSDXC cards, and I tested it even with 128GB SanDisk to work without a problem. As a bonus, you will also get micro-USB to full size USB adapter so you can plug it into your laptop or computer to transfer files directly.
The key feature of this gadget is OTG usb support where once plugged into micro-USB port of smartphone or table that supports OTG - it will be automatically recognized as external drive. Worked like a charm with all my Galaxy devices. So now you can extend your storage capacity externally by up to 128GB with microSD card without a need to swap your flash cards. Also, that seller on Amazon is the same store (zhengnan) where I got my Xiaomi Piston headphones, so I trust them.
Overall, great little gadget, works perfectly with your phone without a need for any OTG cables, supports high capacity flash cards, and comes with a bonus USB adapter to connect to your computer. All for $7 shipped is a fantastic deal!
Here are the pictures.