Legal Hold Libraries includes the Questionnaires, Questions, and Attachments libraries.
Attachments are files that appear as links in the Custodian portal. For example, you may want to provide a supplemental document for a custodian to read before they acknowledge participation in a project. Attachments, unlike communications, aren't sent out to custodians. See Portal Content.
To add an attachment to the library:
Click New Attachments.
Click Choose File.
Locate the file you want to upload.
Click an attachment to view its details.
Click Delete to delete the attachment.