OTG Explorer : PRO

USB OTG Checker does not allow you to do that testing. It will not change your device:usb otg checker app
USB OTG Checker makes it easy to test whether your phone is compatible with USB OTG devices. OTG or On The Go USB devices are devices that can be used on the USB port of your device via a suitable OTG USB cable,otg connector
OTG Disk Explorer lets you to read USB flash drives as well as card readers from your Nexus 7 or Nexus 10 tablets. All you have to do is connect the flash drive to an OTG(On-the-go) cable then plug in the micro USB connector of your tablet, then open this app you will see all files in USB drive and you can open them with your favorite app viewers or editors. hard disk compatibility through otg app usb.
Current support FAT32 disk format of flash drives. Note: Lite version limit single file size to 30mb, if you need to open file file system
No need to root your Nexus! Use your external USB flash storage devices on your Nexus by installing OTG Disk Explorer. You can also use this application as a nice file browser. i flashdrive hd
The fully featured Nexus OTG Disk Explorer is easy to use with its user-friendly interface and intuitively designed icons. And the best part - NO ROOT NEEDED and it is absolutely FREE pen drive.