What is the USB OTG feature?

The so-called USB OTG feature, which allows Windows Phone devices to connect to the flash drive, external USB hard drive, keyboard, or even mouse, via a USB interface, usually requires a special wiring connection.

Some Windows Mobile devices have already supported USB OTG functionality as early as more than 10 years ago, but the solution to this feature is still very confusing today.

Can we imagine how odd it is to connect your phone to a peripheral keyboard via a USB cable? The old cable management level is already low.

While some Android devices already offer this feature, few Android users connect the flash drive directly to their phones, and what we see more often is the way the Bluetooth keyboard is used by ipad users.

The Win10 for Phone (WP10) system may really bring this functionality to Windows Phone devices, but we know that the Bluetooth HID protocol that supports connecting the Bluetooth keyboard is about to come in the WP8.1 GDR2, and now the cloud disk storage is very popular, so USB Is OTG functionality as important as it used to be in the cloud storage era?