Hi @Romualdo Mendes 

I think it would be better to fetch that file using a powershell script (if you prefer, loaded into the MID server) and have it running once a day/hour/minute, related to your needs.

Through this powershell script you could get the file and pass it to a ServiceNow instance using API (see docs here on how to post an attachment to a specific record: Attachment - POST ).

You can attach it to a record on sys_data_source table for example, and then create a Scheduled Import that load that specific data source right after your file has been attached to it.

It's quite a lot of "puzzle pieces" to put together, but it should work correctly. I don't suggest this method if you need to always check for that file every minute or second, but if it is once an hour it should be ok.

Regards

Simone