According to OPL's GitHub repository main page, OPL supports the PS2's HDD, USB and SMB, according to this (link mentioned in OPL's GitHub repository main page), it supports the PS2's HDD, USB, SMB and i.LINK, and according to what I read in OPL's GitHub Repository's changelog regarding the latest stable version, it now supports i.LINK and MX4SIO.
Last edited by Windows_10_User,