CobianSoft

I guess you are using FTP as a destination (that is the only case retry is used). Do you find some information in the log file at the server side?

You could use parameters as well. (See the help file) . %DATENOTIME should do it.

No hay prohibición alguna de otros idiomas. Puede ser que estés usando alguna tilde o ñ en la contraseña? Los archivos zip en general soportan solo ASCII como default. Existen diversas extensiones para resolver este problema pero todos lo implementan de manera diferente. Trata de usar el "descompres...

Use the "Create separated backups" function for your task.

NTFS and Windows don't use UTC time by default (it can). Most Linux systems use UTC. Could that be the problem?

The copy of the files is provided by CopyFileEx API function , so it's the operative system which actually is copying the files. So if the OS does some optimization behind the scenes, the the program is also using it, indirectly. No additional optimizations are done.

I don't see any problem with the configuration. Perhaps the problem is in the history of the task. Are there some old backups in the task that maybe don't exist anymore?

I would begin by changing the installation mode from Service to Application to see if the problem is solved.

Not without a backup no...

Is the Clear archive attribute on the Advanced tab set?