File move into subfolders on distant server

Yes, the user drop several files (sometimes several hundred) in the 3rd rank folders (D3, D30, …).
All files (except errors written in the log) are processed by the script.
This folders didn’t store any files.
This folders are for workflow purpose: drop then immediately processed by the script.

No, all folders and files > 45 days (even those in error - they are obsolete), must be deleted.

Tanks,

GK