I am trying to use RMPrepUSB's (v2.1.734) "Create ext2/3/4 FS" option. My goal is to create a persistent image file that I will use in conjunction with a Ubuntu ISO. I selected the option to list large drives. What I'm trying to do is create a 32GB persistent file on my external HDD, then later copy that file to my E2B drive. My HDD is selected. I can get as far as selecting the FS I want to use (ext4), then it just exits. Not RMPrepUSB itself, just the prompt to create the FS. In the drive list it says my HDD is "unmounted". My gut feeling is that RMPrepUSB sees it this way because the sole partition on the drive is encrypted with VeraCrypt. Even in Disk Management the volume is seen as raw. But it is indeed mounted and accessible in Explorer, etc. Is there a way to force RMPrepUSB to simply write the image file onto the root of this drive, since it is accessible? I really would prefer not to have to write this large file onto my SSD, and writing it directly onto the E2B drive may be a bit slow.