OTG Master

OTG Master lets you mount VeraCrypt, LUKS and BitLocker-encrypted USB drives, and read Mac APFS drives, directly on your Android device — no root required.

Connect an encrypted volume via USB OTG, enter your password or use your fingerprint, and access your encrypted files through Android's built-in Files app. Unmount safely when done.

FEATURES
• Multiple Encryption Formats — mount VeraCrypt, LUKS1, LUKS2 and BitLocker volumes (BitLocker with its password or 48-digit recovery key)
• Broad File System Support — read and write files on FAT32, exFAT, NTFS and ext4 partitions
• Mac Drives — read APFS drives, unencrypted or encrypted with a password, case-sensitive or not
• Read-Only Mode — optionally mount partitions safely without risking accidental modifications
• Auto Mount — automatically unlocks known drives on connect using biometric authentication
• Hub Support — multiple USB drives connected via a hub are all prompted in a single biometric step
• Keyfile Support — use a keyfile in addition to or instead of a password
• Custom PIM — supports non-default PIM values for stronger key derivation
• Cipher Selection — AES and Serpent supported
• Partitioned Disks — scans MBR/GPT partition tables and lets you pick the exact volume to unlock
• No Root Required — works on standard, unmodified Android devices
• No Cloud, No Tracking — your files never leave your device

REQUIREMENTS
• Android 8.0 (Oreo) or later
• USB OTG cable or adapter
• A VeraCrypt, LUKS or BitLocker-encrypted USB drive, or an APFS drive from a Mac

OTG Master is free and open source.

• New: NTFS read/write, plain or in VeraCrypt/LUKS
• New: BitLocker, by password or recovery key
• New: Mac APFS, encrypted too, read-only
• New: App folder access survives remounts
• Fixed: LUKS2 4K sectors refused
• Fixed: slow ext4 deletes; ext2/3 read-only (writes damaged it)
• Fixed: FAT32 folders failed to open; write damage
• Fixed: exFAT drive names; deletes didn't free space
• Fixed: some phones couldn't read drives
• Fixed: Android 10 lost passwords after 4+ mounts