Very simple, go to this link and download the latest version of MiXplorer (A simple, yet feature filled & comprehensive file manager/explorer. [APP][2.0+] MiXplorer v6.x Released (fully-featured file manager)Please note that you will first need to go to device Settings>Security and enable Unknown Sources. Now install the MiXplorer app that you just downloaded. Go into the app Settings>More Settings and scroll down until you reach the option called "Enable OTG" and enable the option. This option will install custom USB OTG drivers on your Android device for FAT32 (R/W), exFAT (R/W), and NTFS (R). Note: this DOES NOT require that your device be rooted.
Once you complete the above steps reboot your device and attach a USB OTG storage or peripheral device with your MiXplorer app open. You will see a file directory on the left hand side of the screen recognize your OTG device. Grant any storage permissions prompted on your display and you now have OTG support.