Hi @Jack O'Sullivan ,
According to your description, you have learned about Sync, which is the official recommended method:
But it does not satisfy you.
Then you can try Map SharePoint as a Network Drive (https://www.sharepointdiary.com/2019/09/map-network-drive-in-sharepoint-online-using-powershell.html)
or Add SharePoint Document Library to “Quick Access” in File Explorer (https://www.sharepointdiary.com/2019/01/how-to-add-sharepoint-to-quick-access-in-windows-10.html).
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