A phone or tablet feature that has completely stopped should be checked for a disabled permission or setting before assuming hardware failure. For Android USB file transfer, first use a known data cable, unlock the phone and select File transfer on a direct computer port.
What this covers
- Android USB file transfer with this exact failure state
- Diagnosis across charge-only cable versus port, host driver, USB preference and security prompt
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleCheck whether the feature is grayed out, missing from settings entirely, or present but unresponsive when used. Expected behavior: enumerate as a data device with the phone unlocked and USB mode selected.
Isolate the component boundary
ReversibleUse a known data cable, unlock the phone and select File transfer on a direct computer port. Test the same feature in a different app that uses it, and with recently installed apps disabled or in Safe Mode. Boundary to separate: charge-only cable versus port, host driver, USB preference and security prompt.
Correct only the proven cause
ReversibleReplace the charge-only cable or correct the host driver/USB preference. Re-enable the permission or setting, or update/reinstall the one app where it fails.
Verify and stop safely
ReversibleConfirm the feature works from a cold restart in at least two different apps. Stop for heat, liquid, corrosion, bent contacts or unstable storage writes.
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