We have Few Tool in the Market for Data Importing/Exporting, This tool helps us a lot with many governer Limits. We can do almost Five Lakhs Records in a Single Go.

Data Loader is a fantastic tool to log in to org and perform Bulk operations using Bulk API. Suppose we want to load some data to the org, which is 50K records which we cannot do one by one, SO here comes Data loader, which will perform the task in one shot. We have to create a CSV of the records and complete the Action. We can perform Insertion and Upsert of records using Bulk Api in one shot which makes the task of admin A lot more straightforward. We can direct Login to the Org where we want to perform the Action use the CSV, and result of the DML will be available in a downloadable file

Easy to install. Works seamlessly with Salesforce and Excel.