Hi @wjsalisch
Here’s a link to instructions for syncing: Getting Started with Sync
Codebook supports Google Drive and Dropbox cloud sync options (it doesn’t support iCloud sync as you mentioned).
Syncing with a cloud provider creates an encrypted replica of your Codebook data in your personal cloud service account which can only be decrypted using your master password. We never recommend sharing your master password with anyone as it gives them full access to all your data.
That being said, I can understand your desire to give a family member access to your very important information/accounts if something were to happen to you. Perhaps instead of sharing your master password with them, you could write it down along with your cloud service account credentials and our email address/website and store it somewhere secure, like a safe. Then specify in your will that the family member is to receive the key to the safe. Another option would be to export your data as a .CSV and store that in the safe. .CSV export can be found in the menu on the Desktop version of Codebook under the File -> Export.