File count over limit in MS 365 when copying

The number of files and the size of files can limit or block this operatio:n.

You can transfert to or from Onedrive to Sharepoint by Powershell script, but the limit there is 50 MB.

I had to develop a specific script to manage that problem, downloading locally the biggest files, and uploading these files.
Because, the moving were too often blocked and not finished.

This kind of script uses the CSOM library and the Microsoft.SharePoint.Client:

https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/complete-basic-operations-using-sharepoint-client-library-code

Here is a little part of my sample script :

#sharepoint online powershell to move files
          $MoveCopyOpt = New-Object Microsoft.SharePoint.Client.MoveCopyOptions
          $Overwrite = $True
          [Microsoft.SharePoint.Client.MoveCopyUtil]::MoveFile($LocalCtx, $SourceURL, $TargetURL, $Overwrite, $MoveCopyOpt)
          $LocalCtx.ExecuteQuery()

If necessary, I can give you a link to the full script.

Is the script limited by 50MB also.  Thats super low...

So it would seem that just downloading their OneDrive and then uploading it sometimes might be the only option.  I thought maybe there was a tool in 365 that could be used.