For anyone searching for an easy way to transfer documents from one SharePoint to another without any loss of crucial data such as version, metadata, and hierarchy of folders, manually downloading and uploading documents may not be an efficient process, especially when there are many documents involved.

After doing research on this I found a reliable tool which is the Kernel Migrator for SharePoint. This software has capabilities to migrate large amounts of SharePoint content along with metadata, document versioning and permissions where applicable.

Before beginning the migration process, I would recommend to first test a smaller subset of documents in order to verify that the information is properly being displayed on the other end of the migration. Free trial of the tool is also available for someone not willing to directly purchase the product.

Read More - https://www.nucleustechnologies.com/sharepoint-migration/