# Guides

Short, practical guides about where Mac storage goes and how to get it back without breaking anything.

- [What is System Data on Mac, and why is it so big?](https://seeyourdisk.com/guides/what-is-system-data-on-mac/): What the grey bar in Storage settings contains, why it grows and why its size jumps around.
- [How to clear System Data on Mac safely](https://seeyourdisk.com/guides/how-to-clear-system-data-on-mac/): Step-by-step, from safest to most effort, with the Terminal commands and the things you should not delete.
- [How See Your Disk cleans: methods and safety levels](https://seeyourdisk.com/guides/how-see-your-disk-cleans/): A transparent explanation: rules instead of guesses, three safety levels and what is never touched.