| udif | Apple Mac OS X Universal Disk Image |
| ufs | FreeBSD Unix File System Image |
| uibak | UltraISO Backup Image |
| uif | MagicISO Disk Image |
| v2i | Norton Ghost Virtual Volume Image |
| vaporcd | VaporCD Image |
| vc10 | Virtual CD v10 Image |
| vc4 | Virtual CD Image |
| vc5 | Virtual CD Image |
| vc6 | Virtual CD Image |
| vc8 | Virtual CD Image |
| vc9 | Virtual CD Image |
| vcd | Virtual CD Image |
| vcf | VPHybridCAD Old Drawing |
| vci | VPHybridCAD Old Drawing |
| vdd | Phantom Burner Virtual Disk Image |
| vdi | VirtualBox Virtual Disk Image |
| veracrypt | VeraCrypt Encyrpted Volume |
| vfd | Virtual Floppy Disk Image |
| vhd | Virtual Hard Disk Image |
| vhdx | Windows Server Virtual Hard Drive |
| vma | Proxmox Virtual Machine Archive |
| vmdf | MyWinLocker Encrypted Virtual Drive |
| vmdk | VMware Virtual Disk File |
| vmwarevm | VMware Fusion Virtual Machine |
| volarchive | CopyCatX Volume Archive |
| wbfs | Wii Backup File System |
| wbi | Wii Backup Manager ISO |
| wdf | WinDupe Disk Image |
| wii | Scrambled Wii Disc Image |
