Elefull Waterproof USB Flash Drive 16GB Smallest with Free Micro USB/OTG Adapter for Mobile Phone Computer Tablet Car Music Player (We Have Other Option 64GB 32GB 8GB in Our Store)

Honest review - this thing is really good to the fact that it's not sticking out in the way tobedamaged by passerby when plugged into computer but when ready to use with phone it fits perfectly and tight so it cannot fall out easily even with a case but due to tight fit it takes a lil time to remove the adapter part when wanting to use it as a thumb drive for PC and not phone