Error writing a catalog file, check available disk space.
An error occurred while an internal catalog file was being written to. A bad spot has been detected on your disk. Or there is not enough space on the target disk.
Use Windows Explorer to check the available disk space. Select the root folder and then read the disk space statistics from the status line at the bottom of the window. If necessary, delete some files to free disk space. Then return to the Backup window and retry the catalog operation.