I have recently gone through an informative article that allowed me to transfer OneDrive files to Google Drive effectively. In this article, I learned about the top reasons that generate the need to migrate OneDrive data into Google Drive. Additionally, this article provides a detailed manual process to accomplish it. The manual process consists of two different stages. 

1. Download data from OneDrive.
2. Upload data to Google Drive.

The manual approach seems easily executable however, there are some limitations associated with this process. Therefore, experts have recommended opting for the best OneDrive Backup Tool which is a fast and secure way to accomplish this task.