Scenario Multiple Files to One File

Hi All,

I have this scenario.

R3 Generates

File_A.txt

File_B.txt

File_C.txt

File_D.txt

And I have to pick up and send to an FTP only one with the name FILE.txt but if a file exits in FTP (Legacy) I dont have to overwrite it.

Example:

R3

File_A.txt

File_B.txt

File_C.txt

File_D.txt

Legacy

FILE.txt --> does not exits and I will create it with content of  File_A.txt

So, I dont have to send other ones (File_B.txt File_C.txt File_D.txt)

Any idea how to do it?

Thanks!

Cerbero.