Why does the Toolkit app keep asking to access my data?

I have only allowed it to access my data as I am 'afraid' that if I don't my mobile Seatgate storage drive won't be able to perform routine TM backups. No other reason. It does perform backups but I don't know if the Seagate is doing it 100% without me giving my permission.

I have access system prefs and i have ticked the box for Toolkit to have access, but still the darned box keeps appearing. It won't go away.

Do I even need the Toolkit as I only use the Seagate for routine TM backups. If not, can I delete it without deleting it affecting the backups?

Please help anyone.