Fix: Your hardware is too weak for the 500GB image's settings. Lower the resolution in Game Settings > Per System Advanced Configuration > PS2 > Rendering Resolution to Native (PS2).
Download Batocera:
Write the Batocera Image to Your Device:
Booting Batocera:
Configure Batocera:
Adding Games:
This is common. A "500GB" image often requires a 512GB drive because manufacturers define 1GB = 1,000,000,000 bytes, while computers use 1,073,741,824 bytes. Solution: Use a 512GB SSD or a 1TB drive. You can also shrink the image using resize2fs on Linux, but this is advanced.
Let's address the elephant in the room. A Batocera 500GB download from ArcadePunks or similar sites almost certainly contains copyrighted commercial ROMs. Downloading them is legally gray at best, illegal at worst, unless you own the original cartridges or discs.
If you want a legal setup:
This ensures you have a clean conscience and a fully legal 500GB gaming machine.