How to grant storage permissions on Android?¶
RecDual Link App requires storage access permissions on Android to communicate with your RecDual Dongle. This guide shows you how to grant the necessary permissions.
Why Storage Permission is Needed¶
Storage permission allows RecDual Link to:
Read and write configuration files
Access recorded videos for playback
Write firmware files for updates
Manage files on the TF card
Without proper permissions, the app cannot fully function.
Granting Permission During Setup¶
When you first try to bind your device, the app will request storage access:
Step 1: Start Binding
Connect your RecDual Dongle
Open RecDual Link App
Tap Bind Device
Step 2: System File Picker
A file browser will appear
Navigate to find your RecDual Dongle storage
It may appear as “USB drive”, “External storage”, or with a volume name
Step 3: Select Root Directory (Recommended)
Don’t enter any subfolders - stay at the root level
Tap Use this folder at the bottom
A confirmation dialog appears
Step 4: Confirm Authorization
Tap Allow to grant access
Wait for the app to complete binding
You’ll be taken to the Dashboard
Manual Permission Setup¶
If you accidentally denied permission or need to re-grant access:
Method 1: Through Android Settings
Go to Settings > Apps (or Applications)
Find and tap RecDual Link
Tap Permissions
Tap Storage or Files and media
Select Allow or Allow all the time
Method 2: Through App Settings
Open RecDual Link App
Go to Settings
Tap Reset Binding Permissions
Follow the file picker process again
Grant access when prompted
Android Version Differences¶
Android 10 and earlier:
Simple storage permission model
Grant “Storage” permission in app settings
Root directory access typically available
Android 11 and later (Scoped Storage):
More restrictive storage access
Uses Storage Access Framework (SAF)
Must select folder through file picker
Some devices may limit root directory access
Root Directory vs Subfolder Access¶
Root Directory Access (Full Features):
Select the drive/device root when prompted
Unlocks all features including firmware updates
Recommended for best experience
Subfolder Access (Limited Mode):
If root access isn’t available, select Videos folder
Basic features work (playback, download)
Cannot perform firmware updates
For more details, see Understanding Root Directory vs Limited Mode.
Troubleshooting Permission Issues¶
“Permission denied” errors
Go to Settings > Apps > RecDual Link > Permissions
Ensure Storage permission is granted
Try “Reset Binding Permissions” in app
Rebind the device
Can’t see RecDual Dongle in file picker
Check OTG is enabled
Verify device is connected
Try disconnecting and reconnecting
Restart the app
Permission keeps getting revoked
Some phones have aggressive permission management:
Go to Settings > Apps > RecDual Link
Look for “Remove permissions if app isn’t used”
Disable this option
Re-grant permissions
File picker shows empty or wrong location
Make sure RecDual Dongle is recognized by system
Check Settings > Storage for external devices
Try switching USB modes if prompted
Restart phone and try again
Specific Phone Instructions¶
Samsung Galaxy:
Settings > Apps > RecDual Link > Permissions > Storage > Allow
Google Pixel:
Settings > Apps > RecDual Link > Permissions > Files and media > Allow all files
Xiaomi/Redmi:
Settings > Apps > Manage apps > RecDual Link > App permissions > Storage > Allow
OnePlus:
Settings > Apps & notifications > RecDual Link > Permissions > Storage > Allow
Tip
If you can’t find the exact settings path, search “RecDual” in your phone’s settings search bar.