Plugable USB MicroSD Card Reader for Phone, Laptop, and Tablet Computers (Built-in Type A USB and Micro-B OTG Connectors) Supports TransFlash, microSD and microSDHC cards up to 32GB (no support for microSDXC 64GB or above) MicroSD can be read or written from either built-in standard USB OTG "Micro B" or USB "Type A" Port. Works on either USB 2.0 or USB 3.0 ports (at USB 2.0 speeds) Complies with USB Mass Storage Class specification Rev. 1.0 Operating Systems Supported: Windows XP, Windows Vista, Windows 7, Windows 8, Mac OS X, Linux  anything supporting USB Mass Storage Class devices Please note, compatibility warnings: iOS devices including iPhone/iPad/iPod are not supported. Android device compatibility varies widely by device, and is likely to require additional applications and/or root access