If started in VM It is not possible to use a partition with ExtFat directly from windows explorer. The partition is visible and shown as a local drive. But when I click on this drive the message appear that this drive is not formated, but it is. This drive is accessible via mac network but not directly. Windows starts from BootCamp If Windows is started native, this ExtFat Drive is accessible from Windows Explorer MacOs version: 10.13.2 (High Sierra) Parallels: 13.2.0 (43213) Are there any hints?