In steps:
Click on the "contacts" tab, then choose the desired client or group.
Choose the desired client or group.
Click on the "Cloud Storage" tab.
Add a file to your library
Click on the desired file to add to your library.
Click on the "Actions" button.
Choose the option "Add to library".
The file will then be available to be shared among your other clients.
⚠️ N.B.: Only files that you have imported can be added to the library.
Add a file from the library
From the "cloud storage" tab, click on "Add from library".
Further information
To learn more about cloud storage, click here.
To find out how your clients can share files with you, click here.