None of the more popular cloud storage providers have a way to migrate from one to the other. You either need to download the files from one and upload them to another, or use a third-party service such as mover.io to do the transfer for you.
Community Moderator @ Dropbox
Did this post help you? If so, please give it a Like below.
Did this post fix your issue/answer your question? If so please press the 'Accept as Solution' button to help others find it.
Still stuck? Ask me a question! (Questions asked in the community will likely receive an answer within 4 hours!)
You can follow the download and upload method to perform this migration process or you can go for any automated software. I suggest you, try CubexSoft OneDrive Migration Tool. You can download it for free from its official page.
[external link removed to align with our Community's Guidelines]
If you need more help you can log a ticket with our Support Team here (expected response time 24 hours), or contact us on Twitter or Facebook.
For more info on available support options, see this article.
If you found the answer to your question, please 'like' the post to say thanks to the user!