Settings & keep-time · Quiet Hours, pausing and schedules
What does "Also wait until you've been idle for" mean in Scheduled mode?
Short answer: Outside your scheduled window, Storage Studio still waits until you haven't used the keyboard or mouse for this many seconds before starting heavy work. The default is 600 seconds (10 minutes).
It's an extra condition on top of the scheduled window: even outside your quiet hours, Storage Studio won't start heavy automatic work until you've left the keyboard and mouse alone for this many seconds. The default is 600 seconds (10 minutes).
That's why automatic work sometimes waits a little even when the clock says it's allowed. Lower the number if you want it to start sooner, or raise it to be even more out of your way.