Why Does My File Transfer Keep Disconnecting?

There is nothing more annoying than watching a 4 GB file reach 85% only to see: "Connection lost." Why do file transfers disconnect, and how can you stop it from ever happening again?

Why Does This Usually Feel So Annoying?

Smartphones are programmed to aggressively put background apps and Wi-Fi chips to sleep to preserve battery life.

How to Do It in 3 Easy Steps (No Cables, No Apps!)

Think of iFileSender Stable Transfer like a super-fast invisible slide between your two devices. Here is all you have to do:

Step 1: Open iFileSender and Pair Up

On Device #1 (like your Mac or iPhone), open your browser and go to iFileSender. You will see a friendly 6-digit pairing code and a QR code on your screen.

Now grab Device #2. Open the browser or camera, point it at the QR code, or simply type in the 6-digit code. In less than a second, both devices give each other a high-five and pair up directly!

Step 2: Pick Your Files from Either Side

Because iFileSender works both ways (two-way street!), you can send files from either device. Tap or click Select Files or simply drag and drop your photos, videos, or documents onto the screen.

Step 3: Zoom! Direct Local Wi-Fi Transfer

Hit transfer! Your files fly directly across your local Wi-Fi router from one device to the other. There is no server in the middle, no waiting for slow cloud uploads, and no compression. When it finishes, tap Save and your files are right in your downloads or gallery!

The Top 3 Disconnect Triggers

• 1. Screen Lock & Sleep Timeout: On iPhones and Androids, locking your screen pauses browser network activity. Keep the screen active until the transfer hits 100%.
• 2. Switching Wi-Fi Bands: Mesh routers sometimes force your device to jump between 2.4 GHz and 5 GHz midway through a transfer, resetting the connection. Stay in one place near the router.
• 3. Low Battery Throttle: When your device drops below 20% battery, aggressive power saving cuts background network throughput. Plug your device into a charger.

Pro Tips for Blazing Fast Transfers

• Temporarily increase your screen auto-lock timeout to 5 minutes for large transfers.
• Don’t switch to other apps while a large file is in flight.
• Keep devices in the same room as the Wi-Fi router.

More Helpful Guides You Might Like

Check out these other simple guides to move files like a pro:

• Why Does File Transfer Fail on iPhone? — iOS background sleep guide.
• Why Do Large File Transfers Fail? — Large file crash prevention.

Frequently Asked Questions