Working with backup sets : Cloud (Salesforce.com) backup sets (Windows) : Before you begin
 
Before you begin
Before performing a backup and restore of a Backup from the Cloud (Salesforce.com) backup set, ensure that the following prerequisites are met:
• Install the Backup from the Cloud Plug-in on the DS-Client computer. The plug-in is on the installation DVD in the following folder:
\Software\DS-Client\DS-Client_FullFeatured\Windows_64_bit\plugins\install.exe
• The Local Storage Path must be set (see “Local Storage Tool”.)
• You must possess a valid Salesforce.com account (username, password, and ‘security token’).
• Your Salesforce product must be an edition that allows API integration: Enterprise, Unlimited, Developer, or Performance. Backup and restore is not supported for editions without API integration, such as Starter or Professional.
• The DS-Client computer must connect to the Salesforce.com site. Optionally, you can configure DS-Client to connect to Salesforce.com via a proxy server (on the Setup menu, click Configuration, and then click Connections).
For more information, see the Knowledge Base article in “Backup from the Cloud (Salesforce.com)”.