I have a Windows 10 host PC and a Linux Mint 18.2 virtual machine under Oracle VM VirtualBox (V 5.1.26r). The Windows OS and VirtualBox run from the same hard drive, and I would like to extend the ext4 storage of my virtual machine by enabling it use an additional ext4 formatted internal hard drive as storage. I was able to format the drive as ext4 under Windows using PartitionGuru, but how can I make this drive available as storage to my virtual machine? Note that I do not have space on the NTFS boot drive to add the ext4 drive as a Virtual Drive.
EDIT: Using Ext2Read in Windows I was able assign the ext4 drive a letter name. I was then able to use this drive as a shared folder in my Linux VirtualBox, but the problem here is that this changes all of the default Linux permissions, e.g., all text files become executable. How can I mount AND keep permission?