Trying to create a new backup but it keeps failing with the following error

Error occurred during backup; Arithmetic operation resulted in an overflow

We have 3 other backups and they all work fine
> Amazon s3
> Local Network storage server
> Local USB drive

The new back up is to a local NAS drive, it has an NTFS file system and Cloudberry has access to it. The back up plan was copied from one of the working backups and then amended to point to the new location. Files back up but it gets to around 3GB or 3600 files and then it errors. Starting it again it checks for any files that have been updated since the last backup then it continues from where it left off with new files and folders then fails again?

We have tried creating a whole new backup plan but this does the same thing?

Is it because of the sheer number of files that it can't handle it and I will have to keep re starting it until I have a full backup then the incremental's will work ? When it fails it also doesn't send a confirmation email to say it failed?

Anyone shed some light on this ?