mtime
Specifies whether to preserve metadata indicating the last time that a file was written to before the PREPARING step of your task execution. This option is required when you need to run the a task more than once.
PRESERVE(default) - Preserves originalMtime, which is recommended.NONE- IgnoresMtime.
The following applies only to Basic mode tasks:
If Mtime is set to PRESERVE, Atime must be set to BEST_EFFORT.
If Mtime is set to NONE, Atime must also be set to NONE.
Enhanced mode tasks don't support Mtime set to NONE.