WinArchiver supports up to 23 virtual drives. The software will create one virtual drive by default. You can change the number of virtual drives if you need more virtual drives.
1. Start WinArchiver.
2. Click "Mount" button on toolbar, the virtual drive popup menu will display.
3. Choose "Number of Drives" from the popup menu, then select number of virtual drives you want to have.

You can also change the virtual drive count using the shell context menu or by clicking the systray icon.