You should be able to set a variable that uses a calculation to append the record number to the Filepath. "filewin:/A:/directoryname/" & table::record number & ".csv"
The problem your going to have is "Export Records" will always export your entire found set. So stepping through all the records would result in 200 identical files that only vary by filename.
I suggest using "Export Field Contents" instead. Then you can step through the found set exporting just a single field from a single record. To use it you'll have to create a calc field with all the fields you want to export and then export that field.
It would look something like this.
"/"" & Field1 & "/"," & Field2 "/"," & Field3 "/""
Some Gotcha's would be if a field already has a quote in it, it would screw up whatever app your importing these into. Depending on your app, carriage returns might also cause your import to fail.
You can use the "substitute" function to change quotes and carriage returns into something else that your app won't choke on.
Under some circumstances, export field contents may not produce the desired result. The exported data may not have the correct character set for what you need and you can't specify the character set with export field contents like you can with export records.
Should that be the case, you can still export your individual records if you set up your scrip to produce single record found sets just before updating.