I understand your frustration, and I'm sorry to hear that the previous suggestions did not resolve your issues. It can be frustrating to encounter persistent problems with your Mac. When you experience errors like "disk is full" or similar issues when writing to external disks or network-attached storage (NAS), there are a few steps you can take to address the problem:
1. **Check Available Disk Space**: Ensure that you have enough free space on both your internal drive and the external disks or NAS you're writing to. A lack of free space can lead to errors.
2. **Check File Permissions**: Make sure you have the necessary permissions to write to the external disks or NAS. You can do this by right-clicking on the disk or folder in Finder and selecting "Get Info." Under the "Sharing & Permissions" section, make sure your user account has the appropriate permissions.
3. **Check Disk Health**: Use Disk Utility to check the health of your internal drive and external disks. It can identify and repair disk errors. Follow these steps:
- Go to "Applications" > "Utilities" > "Disk Utility."
- Select the disk in question from the sidebar.
- Click the "First Aid" button to check and repair the disk if necessary.
4. **Network Connection**: If you're experiencing issues with a NAS, ensure that your network connection is stable and that the NAS is accessible over the network. Try accessing the NAS from other devices to see if the issue is specific to your Mac.
5. **Verify External Disk Format**: Ensure that the external disks are formatted in a file system compatible with macOS, such as APFS, Mac OS Extended (Journaled), or ExFAT. Some NAS devices may require specific formats.
6. **Test with a Different User Account**: Create a new user account on your Mac and see if you encounter the same issues when writing to external disks or NAS with that account. This can help determine if the problem is user-specific.
7. **Update Firmware and Software**: Make sure your NAS device has the latest firmware updates, and your Mac is running the latest version of macOS. Outdated software can sometimes lead to compatibility issues.
8. **Third-Party Software**: If you're using third-party software for managing your NAS or external disks, ensure it's up to date and compatible with your macOS version.
9. **Check NAS Settings**: Review the settings on your NAS, especially regarding user access, file sharing protocols (e.g., SMB, AFP), and disk quotas.
10. **Contact Support**: If the issue persists, contact the manufacturer's support for your NAS device. They may have specific troubleshooting steps or updates to address compatibility issues with macOS.
If you continue to experience errors, especially in the Finder when writing to external disks or NAS, it could be due to various factors, including hardware issues or complex network configurations. In such cases, it may be necessary to involve professional technical support, either from Apple or the manufacturer of your external storage or NAS device, to diagnose and resolve the specific problem.
