I bought this product for the Asus Fonepad 7. It can read USB sticks and SD and micro SD cards in theory, but takes forever to read at all what is stored on the cards for pictures. The write I have not even tried, as he after 10 minutes! it still does not have managed all saved folder display with photos (4 GB on a 16 MB card from SanDisk Class 10). With another OTG cable and an old SD card reader from Hama which takes maybe 10 seconds. Simultaneous use of USB sticks and SD cards was not possible. I do not know if there are compatibility issues or contact problems or I caught a Monday device, but this performance was pretty miserable. Conclusion: For this performance is still too expensive!