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

Found this in one of the PS2 systems I purchased. What is it? Looks like it is missing a disc. Is the dongle worth keeping? : r/ps2

Madcatz Gameshark 2 for Playstation 2 : Video Games

PS1 PS2 Unlocked Save Collection 450 Saves 256MB Memory Card 100% Complete

What does a gameshark ps1 memory card do? : r/Gameshark

PS2Netbox

Broadband enabled for quick code updates Game Engine with 3D graphics and sound USB storage device reader PSP reader that allows user to transfer game

GameShark 2

Game Enhancer 7. How on earth do I get this thing working? Can't find any instructions. I just want to access the cheats! : r/psx

SharkPort for PS2 Code and Save Transfer Kit : Video Games

playstation 2 GameShark 2 Memory Card Dongles : Video Games

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

Used (normal wear), GameShark Video Game Enhancer for PlayStation , GameShark 2 V2 Video Game Enhancer for PlayStation 2, Sold as a bundle and

GameShark Bundle for Sony Playstation 1 and PS2 for Sale in Los Angeles, CA - OfferUp

PS1/PS2: GAMESHARK MEMORY CARD FOR CODE STORAGE (USED) [Unit 1-A] - $16.99 : Cap'n Games, Inc., 1000s of New and Used Video Games!

XPort and Sharkport instructions for Monster Rancher - Part 1