Go through these links you will find all information about data migration. https://help.salesforce.com/apex/HTViewSolution?id=000005202&language=en_US https://developer.salesforce.com/page/Fifteen_Things_to_Consider_Before_Your_Next_Data_Migration
Hi, I would recommend you to take advantage of automated data migration service Data2CRM.
The SaaS will provide accurate and secure transfer of the business information keeping preserved the connections between records, regardless you have special technical skills or not. Notice that being a Salesforce partner, Data2CRM can migrate CRM data no matter the edition you choose. Take a look at the service on Appexchange https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000EjVSuUAN
https://help.salesforce.com/apex/HTViewSolution?id=000005202&language=en_US
https://developer.salesforce.com/page/Fifteen_Things_to_Consider_Before_Your_Next_Data_Migration
I would recommend you to take advantage of automated data migration service Data2CRM.
The SaaS will provide accurate and secure transfer of the business information keeping preserved the connections between records, regardless you have special technical skills or not.
Notice that being a Salesforce partner, Data2CRM can migrate CRM data no matter the edition you choose.
Take a look at the service on Appexchange
https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000EjVSuUAN
Hope, it is suitable for advice