In this answer, you delete everything that matches the file name in the entire drive. A DMG file is used to compress and store data on a Mac. If the DMG has a virtual drive mounted, then you cannot delete it because it is still open. You must 'eject' (or unmount) the virtual drive, then you can delete the DMG file from your computer. Concurring to this as long as you want to delete the data in those two.dmg files, you can delete them without adversely affecting your system functionality. Minidump files can be found in Windows Minidump with an extension of.dmp and can be. You can follow the question or vote as helpful, but you cannot reply to this thread.