Memory Card broken

[A Black Falcon]

Yet I have a third party N64 memcard and two third party PSX memcards, and my cousins have a third party N64 card (compressed one, too), a third party DC card, and two third party PSX cards, and all of those cards work fine as far as I know (there were still files saved on all of them as of this summer at least, and they almost never uses them...)... I've had just as many lost files on my first-party N64 cards as on the third party ones. Excepting the two corrupt GC files, my other cards have not lost files... of course, that doesn't cover for files lost from dying/lost hard drives (I've had that happen) or saves lost from dying cartridge batteries (ditto), though...

Of course, all four of those PSX cards are Mad Catz, which doesn't have quite as bad a reputation as Interact... but my third-party (1x) N64 memcard is Interact, as is that DC card of theirs...