Kingston DataTraveler 64GB microDuo USB flash drive

This works perfectly, but any potential buyer has to be aware of 2 things: 1. IT IS SMALL. Very small. It does come with a loop for a key ring, however, albeit a very small one. 2. NOT ALL PHONES SUPPORT OTG. Check to make sure first, otherwise, it could be a real headache. Android 5.0+ shouldn't give you any problems, but 4.0/4.4/etc. might. So check to make sure first.

I've recently bought a 2nd one, the price is right at 30 ¢ per gigabyte! There are several very similar Kingston models, so be sure the small USB connector is called Android OTG if you want to use it with a Droid Turbo phones. ( Walmart #: 554355664). The large USB end will fit both USB 2 & 3 sockets, so your data is 'future proofed for a few years at least. I don't have a problem inserting and removing this tiny size drive, but it has a sturdy metal spot to hook on a lanyard if you wanted to. Also, Kingston warranties this drive for 5 years, the longest in the industry.