Disk Quotas - GeoServer 2.20.x User Manual
The Disk Quotas page manages the disk usage for cached tiles and allows you to set the global disk quota. Individual layer quotas can be set in the layer's properties page. By default, disk usage for cached tiles is unbounded. However, this can cause disk capacity issues, especially when using Direct WMS integration (see Disk Quotas for more on this).
https://docs.geoserver.org/latest/en/user/geowebcache/webadmin/diskquotas.html
