how old is the controller pack? they use a battery (same as many of the N64 carts themselves). perhaps the battery has died...

the expansion is just extra RAM. doesn't save anything...

quote Duncan Idaho

quote DXD

Well, you don't have to worry about me.

And speaking of "spamming", perhaps we should avoid doing such a thing in a place like this.

siwch to PM.

also the controller pack acts as an external battery, the other one acts now only as extra ram, but somehow avoids my data from deletling itslef.

well, its not JUST an external battery. If you pull one apart you'll see it has a live memory chip in it. That's what you are saving to in games that need it. The expansion pack is extra RAM to increase performance of the console. It's pretty much equivalent of increasing DDR memory in your PC...

quote DXD

I don't know if there even was memory cards and the like available for systems like the N64 back then.

um, thats what a CONTROLLER PACK is! from wikipedia:

"The Controller Pak is the console's memory card, comparable to those seen in the PlayStation and other CD-ROM-based video game consoles. Certain games allowed saving of game files to the Controller Pak, which plugged into the back of the Nintendo 64 controller (as did the Rumble and Transfer Paks).[citation needed] The Controller Pak was marketed as a way to exchange data with other Nintendo 64 owners, since information saved on the game cartridge could not be transferred to another cartridge.[citation needed]"

and as you said, where you save to a cartridge, the cartridge is pretty much the memory card...