Why Macos System Storage High

Anything stored on your computer that cannot fit into one of those 5 categories is categorized as other and it seems that the system storage contains the other data in macos high sierra.
Why macos system storage high. Most of the system storage files are hard to locate and the amount of this kind file are enormous. Look how huge is the system storage. Mark on january 28 2019 at 5 50 am. With new apfs apple file system my 13 mac is so much faster and light.
To ensure the system runs successfully on the computer the macos system and its system files cannot be deleted but the rest on the list can be erased to free up the system storage. On the mac computer the file system defines some categories. Willy on february 18 2019 at 5 50 am. So why this higher system storage usage.
So far i m loving it. Deleting the logs regained the space. If was really the time machine snapshots the cause of the huge system storage why my finder window include local snapshots in their calculations of the storage space available on a disk. Macos high sierra huge system storage.
Deleting the file released 30gb from system while documents. I used about this mac storage review files file browser to navigate to the folders files using the most space and found that docker was growing a file called docker qcow2 indefinitely in library containers. Turn off logging in mail window connection doctor. The culprit on my macbook pro was apple mail logs taking up 220 gb.
It turned out during upgradation process macos creates time machine snapshot. The system category appears to be including sandboxed application data which is stored in library containers.