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 
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.)
Option | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Cache Location | 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. | ||||||||||
Storage Used | Amount of storage currently used for cached content. | ||||||||||
Cache Size | 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). | ||||||||||