Change content caching Storage options on Mac
On your Mac, use the Storage options in Content Caching settings to specify how much storage you want to use for cached content.
To change these settings, choose Apple menu > System Settings, click General in the sidebar, click Sharing on the right, click the Info button next to Content Caching, then click Options. (You may need to scroll down.)
Location of the content cache. This option is available only if you have multiple volumes on your Mac.
To change the location of the cache, click Edit.
To empty the content cache, click Reset.
Amount of storage currently used for cached content.
Set the size of the content cache. You can use the slider to enter a value, or enter a value in the text field and use the pop-up menu to choose the units (MB, GB, TB, or PB).