lightroom keeps secret duplicates of each photo so they take up way more room. I'd only keep copies in lightroom of ones you are actually going to edit. There's a program called OmniDiskSweeper which is free and good to showing you how big each file and folder actually is.
on that note there's also an app called daisy disk which shows you in visual form the amount of space files/folders are taking up on your hard drive, so you could can quickly find what's taking up the most space and delete.
lightroom keeps secret duplicates of each photo so they take up way more room. I'd only keep copies in lightroom of ones you are actually going to edit. There's a program called OmniDiskSweeper which is free and good to showing you how big each file and folder actually is.