Okay, I have my 250 GB Samsung EVO SSD split up the way I want it: 190 GB for Windows 10 and 50 GB for Linux Mint. I originally bought this drive as the main boot disk for an old MacBook Pro, but then that machine died, so I recycled the drive in my Hackintosh instead. It's been housing a Windows 10 guest image as its sole file, so I had named it Windows 10. Now that the space is shared with Linux, I renamed it VirtualBox and symlinked the "VirtualBox VMs" folder in my home directory to it.