When to Use Data Loader and Import Wizard in Salesforce

Data Loader is Available in following Editions
Enterprise, Unlimited, Developer, and Database.com Editions

When to Use Data Loader:

• You need to load 50,000 to 5,000,000 records. Data Loader is supported for loads of up to 5 million records.
• You need to load into an object that is not yet supported by the import wizards.
• You want to schedule regular data loads, such as nightly imports.
• You want to export your data for backup purposes.

How to Install Salesforce Apex Data Loader

When to Use the import wizards:

• You are loading less than 50,000 records.
• You can load the Accounts, Contact, Leads, Solutions and Custom Objects. To see the following path, click Your Name | Setup | Data Management.