Even with iso2opl , USB 1.1 is slow. FMV stutters are common. To fix:

The iso2opl.exe file is typically used in conjunction with audio software, such as OpenAL, to provide a seamless audio experience. When executed, the file performs the following tasks:

Before copying any games, you need to format your USB drive correctly. OPL requires the drive to be formatted with the file system, using the MBR (Master Boot Record) partition table. Many large drives come formatted as exFAT or NTFS, which OPL will not recognize without special configuration. Formatting the drive to FAT32 ensures maximum compatibility.