Be careful though! This key works provided that your device is compatible (which is logical when you think about it Follow this link to check it in the "Compatibility" tab.. Personally sandisk.fr/products/usb/dualdrive/ I have a Galaxy S4 and Xperia Z2. Both devices work with the key (it does buy searching).
Once introduced, no installation needed. You can exchange the data from your PC to your smartphone / tablet without difficulty.
In short, no complaints. This is a handy invention for those who have many devices easily and wish to share their files.