However, not every device that has mini USB is also supported. For this, you should definitely check whether his smartphone / tablet "OTG", ie is a USB host device with On the Go, compatible.
To this end, SanDisk offers from [...], to test his device. Only problem is that software updates through the features of the smartphone can change / tablet and thus the list is no longer correct.
I have a Samsung Galaxy S3, in which the key is functioning smoothly. So you can quickly self-recorded videos and photos to copy, which I also insets the stick. Or sometimes go watch a video from the stick. With 32GB has my version of this well enough space.
The stick has built-in protection covers for the USB ports, which should also ensure that not the same something is connected to both sides. The size of the sticks I find small but still pleasant.
My Tablet, a Google Nexus 7, the drive does not support them, or I could also exchange data between your smartphone and tablet.
Conclusion:
A great idea that USB stick and also practical, subject to the limitation that it is also supported.