Well, it was just a 12tb that I stored my steam library and other games. Destiny 2 is 90gb... so it's easier than you think to fill up a 12TB with personal stuff like a 4tb movie library and family photos and videos in 4k.
But yes I am pretty sure I picked deep scan. I knew it would take quite a while, but my main concern was if the standby/lock would impede my progress that I have run for about 2 days or should I start over? If it takes a week to complete I might as well restart unless I can determine that my progress has been maintained.