I used to be a Genius at an Apple store. In about 20-30 minutes we'll thoroughly assess storage on your Mac. I focus on the largest items that we can make decisions about quickly and work my way to smaller items that you can make the decision on your own to delete after we are finish. I find that we can make a meaningful difference in 20-30 minutes. I will delete unnecessary items that you didn't even know were on your computer. Afterwards, I will explain and write out the big picture of what is using up what percentage/amount of GB on your computer. I'm extremely efficient/talented at this and have done this hundreds of times. There are tons of reviews on my website jbbtechnology.com. I'm also very patient and I explain things well.