Storage space on your Mac is precious, especially if you have a 128GB, or even a 256GB SSD. Your Mac can start to slow down and not perform as well when your storage is almost full, at which point you might see a “Your Startup Disk Is Full” warning. So it’s important to know what’s using up the space on your disk and clear out redundant files that build up over time. Another reason you might need to free up space on your Mac is if you are attempting to install a macOS update. When it arrived in 2020 Big Sur was notorious for its hefty storage requirements – with some users faced with the chall…