An administrator for Health Cloud wants to ensure that the files in their full sandbox...

Step-by-Step Explanation:

Requirement:

Encrypt files in a full sandbox instance.

Salesforce Shield Platform Encryption:

Provides encryption of files and attachments at rest across Salesforce environments (including sandboxes).

“Use Shield Platform Encryption to encrypt files and attachments stored in Salesforce, including those in sandbox environments.”—Salesforce Shield Platform Encryption Guide

Other Options:

Classic Encryption:Only encrypts a limited set of standard fields, not files or attachments.

Salesforce Data Mask:Masks data for sandbox use, but does not encrypt files for runtime.

Industry Data Security:Not a Salesforce product for file encryption.