Hi @Aase Nomad ,
As far as I know, Microsoft does not provide a method that moving files from SharePoint Online to on-premises environment. You will need to use a 3rd party tool such as ShareGate.
While Microsoft supports and encourages open-source software development, it does not provide technical support for the softwares from third parties, nor does it guarantee that the software will work as described.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.