BlinkStick Client 2.0-rc10 test for notification "file exists"

In the BlinkStick Client 2.0-rc10 there are in “Notifications” / “add” some tests on “Hardware”
There is a test that could be usefull : test if a file exist (or does not exist)
It could be a way to test if a network drive is actually mounted or not
Has someone a plugin or a way to do this test and trigger a led on this ?
Best regards, Yves