Did you install Ventoy in Windows by Ventoy2Disk.exe?
If so, there is a bug in Ventoy2Disk.exe for 2TB+ disk, see https://github.com/ventoy/Ventoy/issues/614
If so, there is a bug in Ventoy2Disk.exe for 2TB+ disk, see https://github.com/ventoy/Ventoy/issues/614