Snapshot where is it store

You are not saying what type of install you’re running. Many run the Supervised install, because of the freedom it gives you to manage these kind of things, and also to “tune” the OS to reduce writing to disk and protect your SD / SSD storage. So you get all the benefits of a managed Home Assistant, (supervisor, core, audio etc), but you run it on full-featured Debian instead of a locked-down OS where you can’t do zip.
If you do the install using IOTstack, it is all done from a menu, and you get other features on the side like OS backups, upload to DropBox etc.
Of course you could also just look at the scripts and cook up something yourself.