Software⏱️ 2 min read📅 2026-05-31

How to Fix: GitHub: Clone succeeded, but checkout failed

Error caused by insufficient disk space prevents git checkout operation.

Quick Answer: Free up enough disk space to write the new index file, then try again with 'git checkout -f HEAD'.

The 'unable to write new index file' error caused by the lack of disk space is a common issue when trying to checkout after cloning a repository. This occurs because Git needs to update its internal database, and this process requires writing to the index file.

🔧 Proven Troubleshooting Steps

Method 1: Disk Cleanup and Restart

  1. Step 1: Close all Git applications and terminals.

Method 2: Increase Disk Space

  1. Step 1: Open a terminal and run the command `df -h` to check your available disk space.

✨ Wrapping Up

By following these steps, you should be able to resolve the 'unable to write new index file' error caused by a lack of disk space.

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