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OTG Master

Mount VeraCrypt-encrypted USB drives on non-rooted Android
OTG Master lets you mount VeraCrypt-encrypted USB mass-storage devices on Android without root access.

The app reads raw sectors from the USB drive using the Android USB Host API, unlocks the VeraCrypt volume header (AES or Serpent cipher, SHA-512 key derivation), and exposes the decrypted filesystem through a standard Android DocumentsProvider — so other apps like Files or Gallery can browse the unlocked volume directly, just like any other storage location.

Features:

* Unlock VeraCrypt volumes with a password, PIM, and/or keyfiles
* AES and Serpent ciphers, SHA-512 key derivation
* Read and write FAT32 and exFAT filesystems
* Browse and edit unlocked volumes through any file manager via Android's Storage Access Framework
* Support for multiple simultaneously attached USB drives, with a picker when more than one is detected

Filesystems other than FAT32 and exFAT (such as NTFS or ext4) are detected but not yet supported for mounting.
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Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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  • Version 0.3.10 (43) suggested Added on Jul 31, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • app.fayaz.otgmaster.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 12 MiB PGP Signature | Build Log

  • Version 0.3.9 (42) - Added on Jul 18, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • app.fayaz.otgmaster.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 12 MiB PGP Signature | Build Log

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