There is no limitation on the number of files you can upload to a group; however, files must be smaller than 100MB. All file types and file extensions are supported.
In the Start a conversation area, click Files.
Do one of the following:
To add files directly from your computer, click Local Drive.
To choose an alternate file source to add files from, click Cloud Drive.
Drag and drop your files over the upload target.
Do one of the following:
From the Participants drop-down list, select a group of participants.
Enter the name or email of a participant into the Enter a name or email address field. Press Enter.
To import participants from your email contact list, clickImport contacts.
Drag and drop participants from the Contacts area.
Select your notification preference from the drop-down list.