*[[EPROM]] cards or EPROM simulator cards like the [[Britannia ROM Board]], [[Dobbertin]] EPROM card, [[Honeysoft ROM Board]], [[Inicron ROM-RAM-Box]], [[KDS Sideways ROM Board]], [[MegaFlash]], [[MegaROM]], [[SuperPower ROM Box]], [[SYMBiFACE II]], SuperROM Plus and others
==== Mass storage / Hard-disc discs ====*[[Dobbertin Harddisc|Dobbertin HD20]] (72 KB/s data transfer rate)*[[M4 Board]] (SD card supported by XROM, under development, alpha released)
==== Hard-discs discontinued ====