My PS2 can't read the GameShark memory card, does anyone know how

I recently bought a GameShark memory card and the disc isn't recognizing it. what should I do? : r/ps2

My PS2 can't read the GameShark memory card, does anyone know how to fix the issue? : r/ps2

Looking for more information on this Gameshark Massive Memory Card Plus, seems to be fairly rare, anyone ever use one of these before? : r/dreamcast

Any idea how to work this ps2 game shark : r/Gameshark

I have this PS2 GameShark memory card in my PS2, and I'd like to make use of it. I have a couple questions (questions will be in the comments) and I'm hoping

After 20 years, PlayStation 2 can play burned DVD's without a modchip

Gameshark lite PS1 PlayStation 1 No Memory Card

How-To] Install Free McBoot on a PS2 Memory Card With A Gameshark (Simple!)

My son was playing in my office closet and found this lol : r/gaming

PS2 Memory Card ISO Loader Offers Classic Gaming Bliss

My PS2 can't read the GameShark memory card, does anyone know how to fix the issue? : r/ps2

GameShark 2 (Sony PlayStation 2) for sale online