If you work with OneDrive but the 5 GB for free are not enough and you do not want to pay 2 € a month for 50 GB, you have the option to create a MEGA account that offers 50 GB for free. Migrating your files from OneDrive to Mega is easy thanks to Air Explorer.

To start the task you only have to register the accounts of OneDrive and MEGA in Air Explorer. Open both, each in a different window and drag all the files from one to another.

You can check more information here:
-How to move files from Onedrive to Google Drive. Monitor the transfer process.
-How to copy files from Google Drive to Onedrive?
-Transfer files from Mega to other clouds
-How to transfer files from Onedrive to Google Drive?