Lisa,
In the file path you have to mention path of the folder where this file will be stored. In linux it would be the shared folder that Tririga application can access.
In the file name give any name like 'Test.txt'. There is Overwrite boolean check box that drives whether the file will always be overwritten or it will create new file each time IO is executed.
If Overwrite is checked the content of the file is always overwritten when IO is Executed. The filename remains same.
If Overwrite is not checked a new file is created with a datetime stamp as suffix to the filename provided.
In windows it would be something like this (screenshot attached)
Hope this helps.