What is USB OTG?

“USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as digital audio players or mobile phones to act as a host, allowing other USB devices like a USB flash drive, mouse, or keyboard to be attached to  them.” – Wikipedia

What does the app do?

This app “helps” you to mount a mass storage device (pendrive / flash disk etc) on your Android phone. But your kernel must support Host mode for it to work properly (either natively or with the correct modules).
Modules for many devices can be found on my site.


(Enable or disable via Settings, * = Donate version onlly)

  • Automatically start app on device connect * [ See FAQ ]
  • Automatic mount * [ See FAQ ]
  • Mount and Unmount drive with a single click
  • Full NTFS support! (FAT, Ext2/3/4 also if kernel supports)
  • exFAT support! [ See FAQ to enable ]
  • Notification when drives mounted!
  • Load modules required automatically (from /system/lib/modules)
  • Option to enable utf-8 mode (if kernel support)
  • Automatically open the mounted drive * [ See FAQ ]
  • Media scanner triggered on mount [Active media scan in Donate version]
  • One click debugging * [ See FAQ ]
  • No Ads!

What phones are supported?

See list of confirmed working devices: Here

Any phone in which kernel supports USB Mass storage (stock / custom kernels / stock with appropriate kernel modules)
List of modules and kernels: Here

If it works on your device, or you know of kernels or modules please give the details: Here
If it does not work, please report (with log): Here

What are the requirements?

  • root (su binary)
  • supporting kernel / kernel modules
  • USB OTG cable ( or direct card reader, see this kickstarter project  -> )


I will not be held responsible for any damage to your device. Do not use for a long time, u may risk burning the device chip/motherboard due to the voltage supply in host mode.


  1. Settings -> “In-app Busybox preferred” -> Uncheck. Then try again.

If it is still not working send me debugging data(in the app itself for donate version)


4 Responses to Main

  1. Peter says:

    A mini microscope reader directly support it. No need org cable.

  2. Goif says:

    What is this app actually for? Flash drives work in my phone without this app. In what way does this app help?

  3. Ashu says:

    Samsung galaxy s duos gt s7562 not listed here….will it work…

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