Software⏱️ 4 min read📅 2026-06-11

How to Fix: "Path is Too Deep" error when copying files from PC to NAS

Error copying files from PC to NAS device due to path depth limit.

Quick Answer: Check the maximum allowed path length for your NAS device and adjust accordingly.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

The 'Path is Too Deep' error occurs when trying to copy files or folders from a PC to a Network-Attached Storage (NAS) device over a wireless network. This issue affects users who are attempting to transfer data between their local computers and NAS devices using the wireless connection.

This problem can be frustrating, especially when dealing with large file transfers. However, by following the steps outlined in this guide, you should be able to resolve the 'Path is Too Deep' error and successfully copy files from your PC to your NAS device.

💡 Why You Are Getting This Error

  • The primary reason for this error is related to the way Windows handles long file paths. When a path exceeds 256 characters, it can cause issues with the operating system's ability to navigate and manage the path. This is particularly problematic when dealing with wireless networks, where latency and packet loss can exacerbate the issue.
  • Another possible reason for this error is related to the semaphore timeout configuration on the NAS device. The 'semaphore has expired' error message suggests that there may be an issue with the NAS's ability to manage concurrent file transfers.

🚀 How to Resolve This Issue

Using the Windows Command Prompt with the /X Option

  1. Step 1: Open the Windows Command Prompt as an administrator. This will allow you to bypass some of the security restrictions that may be causing the error.
  2. Step 2: Navigate to the directory where you want to copy the files using the `cd` command. For example, if you're copying from `C: ile1.txt` to the NAS device, use the command `cd \NAS older`. Note the double backslashes (`\`) before the NAS device's IP address or network share name.
  3. Step 3: Use the `copy /X` command to copy the files. For example, to copy a file named `file1.txt` from `C: ile1.txt` to the NAS device, use the command `copy /X C: ile1.txt \NAS older`. The `/X` option tells Windows to use long paths and avoid the 'Path is Too Deep' error.

Using the File Explorer with Advanced Sharing

  1. Step 1: Open the File Explorer on your PC. Navigate to the directory where you want to copy the files using the folder path.
  2. Step 2: Right-click on the file or folder you want to copy and select 'Properties'. Then, click on the 'Sharing' tab in the Properties window.

✨ Wrapping Up

To resolve the 'Path is Too Deep' error when copying files from your PC to your NAS device over a wireless network, try using the Windows Command Prompt with the `/X` option or enable advanced sharing in File Explorer. By following these steps, you should be able to successfully copy files between your local computer and NAS device without encountering the 'Path is Too Deep' error.

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