If you're going to be offline (e.g. entering a courthouse with no WiFi or internet access) you should download any iCloud Drive Case Files to be available locally on your devices so you can work on them while you're not connected to the internet.
To download iCloud Drive Case Files to your Mac:
- Click iCloud Drive in the sidebar of any Finder window.
- Open the Case File, or control-click the Case File, then select Download Now.
- Any changes you make to the Case File will automatically upload to iCloud Drive when you're back online.
To download iCloud Drive Case Files to your iPad:
- Open the Files app.
- Go to the Case File that you want to store on your device.
- Tap the Case File to download it, or touch and hold the file, then choose Download.
- Any changes you make to the Case File will automatically upload to iCloud Drive when you're back online.
Apple Support Articles:
Access and manage your files in iCloud Drive: https://support.apple.com/en-us/HT201104
Add your Desktop and Documents files to iCloud Drive: https://support.apple.com/en-us/HT206985