How to Fix the 'Device Is Unreachable' Error When Copying iPhone Photos to a PC

Why Does the "Device Is Unreachable" Error Happen?

You plug your iPhone into your Windows PC, start importing your precious photos and videos, and suddenly—crash. A popup appears stating, "The device is unreachable." This highly frustrating error usually happens because of a feature called automatic file conversion. By default, your iPhone shoots in a high-efficiency format (HEIF/HEVC) and tries to convert these files to standard JPEGs on the fly as they transfer to your PC. When dealing with large files or video clips, your phone's processor gets overwhelmed, times out, and drops the connection.

Fortunately, you can easily fix this issue in under five minutes. Follow these simple steps to ensure a flawless, uninterrupted transfer.

Step 1: Change Your iPhone’s Photo Transfer Settings

This is the most effective solution and resolves the error for 95% of users. By changing this setting, you tell your iPhone to transfer the original files directly without wasting processor power on converting them.

• Open the Settings app on your iPhone.
• Scroll down and tap on Photos.
• Scroll all the way to the bottom to the section labeled Transfer to Mac or PC.
• Tap to change the selection from Automatic to Keep Originals.

Note: If your PC doesn't natively support HEIC/HEIF photos, don't worry. See the bonus step below on how to view them on Windows for free.

Step 2: Disable Auto-Lock Temporarily

When your iPhone screen locks, it enters a low-power state to save battery. This drop in power can disrupt the USB connection and trigger the "unreachable" error.

• Go to Settings → Display & Brightness.
• Tap on Auto-Lock.
• Select Never. (Remember to change this back once your transfer is complete to save battery life).

Step 3: Use the Right Cable and USB Port

Physical connection stability is critical when transferring gigabytes of data. A minor power fluctuation can sever the bridge between your phone and PC.

• Use an official Apple or MFi-certified cable: Cheap third-party chargers often lack the proper data transfer shielding and can only handle charging, not high-speed data.
• Plug directly into your PC: Do not use external USB hubs, keyboard ports, or monitor ports. Plug the cable directly into a USB port on your computer's motherboard (usually on the back of a desktop tower, or directly into the side of a laptop).

Step 4: Reconnect and Run the Transfer

Once you have adjusted your settings and secured your connection, it's time to try again.

• Unplug your iPhone from your PC.
• Restart both your iPhone and your computer to clear any clogged system caches.
• Unlock your iPhone, plug it back in, and tap Allow on your phone screen if prompted to trust the computer.
• Open Windows File Explorer, navigate to This PC → Apple iPhone → Internal Storage → DCIM, and copy your folders over. The transfer should now run smoothly without interruptions.

Bonus: How to View HEIC Files on Windows for Free

Because you selected "Keep Originals" in Step 1, your photos will transfer as .HEIC files instead of .JPG. If your Windows PC cannot open them natively, do not pay for converter software. Instead, download the free HEIF Image Extensions directly from the official Microsoft Store. This utility integrates directly with the default Windows Photos app, allowing you to view and edit your iPhone's original high-efficiency photos seamlessly.