Migration from Server 2016 to Sharepoint Online, issue with Excel connections

Hi all,

I'm migrating various Excel files from a shared server to Sharepoint Online.

Now, these files have a lot connections to other files of same folder or other folders inside the same server.

When I open one of them, connections are interrupted and I should manage them manually.

This is unthinkable! They are thousand of files.

There is a way to correct connections with a tool or something else ? Also a payable tool is ok.