A very good option for . If limited space is an issue the go for the Apple iXpand Flash Drive available in 16/32/64 and 128GB capacities with 2 years warranty.

Thanks to the Lightning connector, you can't just plug a Micro-USB OTG drive into your iOS devices the way you can with Android phones and Windows tablets. You need a drive with the Lightning cable like the SanDisk iXpand , which is now available as a 128GB model, and with extra security options.