Can't Transfer Files on Android — 7 Fixes That Work
File transfer failures on Android are frustrating, but almost always fixable. Here are the most common causes and exactly how to fix them — covering USB, WiFi, and wireless transfer methods.
Quick Answer
Most transfer failures are caused by: wrong USB mode selected (use MTP not charging), a bad cable, or firewall blocking WiFi transfer. Fix these first — they account for 80% of issues.
Fix 1 — USB Transfer: Switch to MTP Mode
When you plug in a USB cable, Android defaults to charging only. To transfer files you must switch mode:
- Plug in the USB cable
- Pull down the notification bar
- Tap the "USB charging this device" notification
- Select File Transfer (MTP)
Your PC or Mac should now detect the Android as a drive.
::: tip If the notification doesn't appear, go to Settings → Developer Options → Default USB configuration → select File Transfer (MTP). :::
Fix 2 — USB: Try a Different Cable
Most USB-C cables sold with budget accessories are charge-only cables — they physically have no data wires. A charge-only cable will never work for file transfer regardless of settings.
Test with a known data cable (usually the one that shipped with your phone). If it works with a different cable, replace the cable.
Fix 3 — USB: Trust the Computer
On first connection, Android prompts: "Allow USB debugging?" or "Trust this computer?". If you dismissed or denied this:
- Unplug and replug the cable
- When the prompt appears, tap Allow / Trust
- File transfer should now work
If you don't see a prompt, check Settings → Privacy → Trust Agent.
Fix 4 — USB Not Detected on Mac
Macs don't natively support Android MTP. You need to:
- Install Android File Transfer (by Google) on your Mac
- OR use AnExplorer's WiFi Share instead — no software installation needed
AnExplorer's WiFi transfer is often more convenient than USB on Mac: both devices must be on the same WiFi network, select files → Share via WiFi → scan QR on Mac browser.
Fix 5 — WiFi Transfer: Same Network Required
AnExplorer's WiFi Share requires both devices on the same WiFi network (or one device creates a hotspot). Common reasons it fails:
| Issue | Fix |
|---|---|
| Devices on different WiFi bands (2.4 GHz vs 5 GHz) | Connect both to the same band |
| Hotspot created but recipient not connected | Connect to the hotspot before scanning QR |
| Firewall on PC blocking the connection port | Temporarily disable Windows Defender Firewall, or allow the AnExplorer port |
| VPN active on either device | Disable VPN during transfer |
Fix 6 — WiFi Transfer: Firewall Blocking AnExplorer
Windows Defender Firewall commonly blocks incoming WiFi transfers. To fix:
- Open Windows Security → Firewall & network protection
- Click Allow an app through firewall
- Add or enable AnExplorer (or the detected browser connection)
- Try the transfer again
Alternatively, switch to a private network — Windows Firewall is less restrictive on private networks.
Fix 7 — USB OTG: SD Card or Drive Not Detected
Plugging in a USB drive or SD card reader via OTG adapter and nothing appears?
- Verify your device supports USB OTG — check USB OTG feature guide
- Ensure the OTG adapter is a powered OTG if the drive needs power
- In AnExplorer, pull down to refresh the storage list
- Check that AnExplorer has storage permission in Android Settings → Apps → AnExplorer → Permissions
Which Transfer Method Is Most Reliable?
| Method | Speed | Requires | Best For |
|---|---|---|---|
| USB MTP | 30–120 MB/s | Data cable + MTP mode | Large files to PC |
| AnExplorer WiFi Share | 20–80 MB/s | Same WiFi / hotspot | Phone-to-phone, TV, Mac |
| USB OTG | 5–120 MB/s (drive speed) | OTG adapter + compatible drive | SD cards, USB drives |
| Bluetooth | 0.3–3 MB/s | Paired devices | Small files only |
| Cloud (Drive etc.) | 1–20 MB/s | Internet on both | Anywhere |
For most situations, AnExplorer WiFi Share is the most reliable method — no cables, no drivers, no firewall issues when both devices are on the same network.