if you want to go down the path of looping through a folder and checking file sizes, there are two steps to add to your package. (I like this idea, as you mentioned, because then you do not need the 7 variables and 7 script tasks)

First is add the for each loop container which uses the Foeach File Enumerator and returns the Fully Qualified path to a variable, which I setup as FilePath

Then, inside of the ForEach Loop, I have a script task with the following code (pass in the FilePath as a ReadOnly variable):

Imports Microsoft.SqlServer.Dts.Runtime

Imports System.IO

Public Class ScriptMain

Public Sub Main()

Try

Dim ofile As New FileInfo(Dts.Variables("FilePath").Value.ToString)

' Check size of file, if 0 then delete

If ofile.Length = 0 Then

File.Delete(Dts.Variables("FilePath").Value.ToString)

End If

Dts.TaskResult = Dts.Results.Success

Catch

Dts.TaskResult = Dts.Results.Success

End Try

End Sub

End Class