Storage on iOS devices is somewhat more lacking than a number of Android devices, which is due to the fact that iOS devices do not have a microSD card port.
However, there is a new device that will allow you to add this kind of functionality to an iPhone or iPad, with just a small adapter.
This microSD card reader has been called the Dash-i and will come in two versions, one that will simply extend an iOS device’s storage, and another that will both extend it and charge the iOS device at the same time.
Both will add up to 200GB of storage.
You can find out more about Dash-i and back it at the source link below.