You can set custom options for Google Drive for desktop, including the default drive letter on Windows, the mount point on Apple macOS, the cache location, bandwidth limits, and proxy settings. These configurations can be set at the user or host level, and persist when Drive for desktop restarts. Admins can override user settings.

Sets the limit on content cache size in kilobytes. The limit is capped at 20% of the available space on the hard drive (regardless of the setting value).The setting doesn't apply to files made available offline or files that are uploading.

 

 This setting is only available for admins, as an override or host-wide setting.




Config.cfg - Google Drive