Your iPhone or iPad does not have a regular USB port for you to use to connect a flash drive. There are many wireless storage solutions available for iOS devices, but if you want to attach a flash drive to your phone, you should give the Leef iBRIDGE a look. This is a flash drive with a Lightning connector, enabling you to open up space on your smart device.
iBRIDGE plugs directly into your Apple device and lets you backup your camera roll fast. You can store your movies or music library on the device and even capture photos directly to it. The j-shape design of Leef iBRIDGE makes it very convenient to use. You will be able to get one with up to 256 GB storage capacity. The 32 GB version sets you back $80.