This makes files from SharePoint or a Teams channel appear in File Explorer, where they can be opened like local files. Requirement: the OneDrive app is signed in with your company account.
Steps
Open the SharePoint site in your browser: via portal.office.com › SharePoint, or in Teams in the channel › Files › Open in SharePoint.
On the left, choose Documents or go to the folder you want.
At the top, click Sync and confirm the browser prompt to open OneDrive.
The library appears in File Explorer on the left under your company name.
Tip: Instead of Sync, you can also use Add shortcut to My files. The folder then appears in your own OneDrive and is available on all devices.
Note: In Teams channels, the default folder is called “General” or “Allgemein” depending on the language. It is the same folder.
Note: If nothing happens after Sync, check that OneDrive is running (cloud icon in the taskbar) and signed in with your company account.