CobianSoft

Aha, everything is OK then. From the FAQ:

viewtopic.php?f=4&t=1539

What do you have in the "Time stamp format in file names" option?

Those are encrypted files. Use the Decryptor tool in order to decrypt them.

Uncheck the option to show the exact progress of the backup. This should solve this problem I think.

What exactly is the issue? Full disk or old backups not being removed?

The only good strategy is to NEVER use the mirror option.

Are you using parameters in your source?

Cobian.Reflector.Application.exe cannot be run as a service. Cobian.Reflector.Service.exe is the service part and the service name is CobianReflectorService

So perhaps it's the date oart that is creating the problem. Some NASes have problem with the semicolon ; in the file name.