Maximum file size field on disk storage properties displays 400GB if it is set to larger than 400GB
The maximum file size field on the disk storage properties may not reflect the specified size. It displays 400GB when it is set to larger than 400GB. This is a problem with the user interface and the displayed size does not affect the actual maximum file size on the disk storage.
Please run the Backup Exec diagnostic application (Bediag.exe) and check the Backup-to-Disk Information section for the current maximum file size of each disk storage.
This issue is currently under investigation by Symantec Corporation. For more information please check the following article.