It sounds like you are encountering an issue related to the file system limitations on your NAS. Here are a few suggestions to troubleshoot the problem:
- Check File System Compatibility: Ensure that your NAS is using a file system that supports large files. If your NAS is formatted with FAT32, it has a maximum file size limit of 4GB. If it is NTFS, it should support larger files, but it's worth confirming.
- Permissions and Access Rights: Verify that you have the necessary permissions to write files to the NAS. Sometimes, access rights can prevent file copying, even if there is enough space.
- Network Issues: Check your network connection. A weak or unstable connection could cause interruptions during file transfers, leading to errors.
- File Name and Path Length: Ensure that the file name and path length do not exceed the limits imposed by the NAS. Windows has a maximum path length of 260 characters, which can sometimes cause issues when copying files.
- Try Different Transfer Methods: Instead of using Windows Explorer, try using a different method to transfer files, such as using a file transfer protocol (FTP) client or the command line.
- NAS Firmware: Check if there are any firmware updates available for your NAS. Sometimes, updating the firmware can resolve compatibility issues.
If the problem persists after checking these factors, consider consulting the documentation or support for your specific NAS model for further assistance.