
Hi @Jacob Aldrich ,
You should Unlink Account for OneDirve first before you format drives, Unlink Account will stop syncing, if you don't Unlink Account, it may sync the empty folders to clound.
I suggest you refer to this support article about "Unlink and Re-link OneDrive":
https://support.microsoft.com/en-us/office/unlink-and-re-link-onedrive-3c4680bf-cc36-4204-9ca5-e7b24cdd23ea
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