Because the internal storage space (32 kB) is limited sooner or later every PC-FX owner needs a FX-BMP memory backup module (128 kB).
The module is backed by two AAA batteries and has it’s own place behind an access door in the PC-FX front expansion port.
When the internal memory is full some games (e.g. Dragon Knight IV, about 12 kB free space required) refuse to start. Then it’s time to move things around until enough space is available for the game to create an initial save state.
The memory manager can be accessed after booting the console by clicking on this icon. Make sure there is no disc inserted (or open the lid), else you won’t be able to access items on the PC-FX main screen.
On the first screen of the memory manager you have the choice between internal and FX-BMP memory (and exit):
After choosing the memory location to handle you get a screen like this:
This is a list of save directories, one directory for each game. On the right is the space taken up by the directories. You can select multiple items in the list by pressing button I on each entry. To deselect an item press button II. Beneath the lists are the commands, from the left to the right they are:
Enter directory – enters a directory
Leave directory – goes back to the root
Copy – copies an item to the other memory location
Move – moves an item to the other memory location
Delete – deletes an item
Format – Formats the chosen memory location, deleting everything on it
Exit – Exits the memory manager
From time to time I accidentally formatted the internal or backup memory because I simply forgot what command did what – so be extra careful not to chose format when you don’t want to!
This is how it looks inside a directory, the directory/game name is above the list:
The commands are the same as above. Very useful to copy/move/delete just one of the save states.