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Set Upload = Server.CreateObject("Persits.Upload.1")

creat an object at the server from "Peesits.Upload" and call it Upload

Upload.OverwriteFiles = False

don't allow to overwrite files at the server

i.e. if the file is already exists don't overwrite it

On Error Resume Next

from now on ignore all errors

Count = Upload.Save("c:\upload")

select the save to location to be a folder at the C drive on the server

can this explain it more ?