When encountering the "Error: EIO: i/o error, mkdir/copyfile" error while importing files to Eagle, it's usually related to hard drive format, connection method, or compatibility issues. Here are several solutions to help you quickly resolve this problem.

Solution 1: Avoid Using NTFS Format Hard Drives on macOS

Through extensive testing, the Eagle team has found that regardless of using third-party plugins like Tuxera NTFS or Paragon NTFS, NTFS format hard drives on macOS systems experience severe performance degradation, with speeds typically less than half of the original.

For detailed steps, please refer to: /support/article/why-we-dont-recommend-using-tuxera-ntfs-paragon-ntfs-on-macos

Solution 2: Confirm Whether the Hard Drive Format is Natively Supported by the System

Native format refers to the default hard drive format adopted by the operating system, such as NTFS for Windows and APFS and HFS+ for macOS. When the hard drive's file system is inconsistent with the operating system's native format, it may cause files to be unreadable or unwritable, or slow down file read/write speeds. By confirming the hard drive format, you can determine whether the problem is related to native format compatibility.

For detailed steps, please refer to: /support/article/how-to-determine-if-your-disk-format-is-natively-supported-by-your-operating-system

Solution 3: Switch USB Ports or Connection Cables

When encountering hard drive read/write errors, trying different USB ports on your computer or using a new connection cable may resolve the problem.

For detailed steps, please refer to: /support/article/troubleshooting-switching-usb-portscables-for-external-hard-drives

Solution 4: Connect the Hard Drive Directly, Avoid Using USB Hubs

The connection quality of USB hubs directly affects data transmission speed and stability. Connecting the external hard drive directly to your computer's USB port, rather than through a hub, can avoid many common issues and ensure optimal performance for Eagle software and other applications.

For detailed steps, please refer to: /support/article/avoid-using-usb-hubs-for-external-hard-drives

Import file failed with error "Error: EIO: i/o error, mkdir/copyfile" solution