Scammers are selling fake Blu-ray drives to PS3 emulation fans
RPCS3 warns of fake Blu-ray drives sold on Newegg and AliExpress with spoofed firmware
You don't have to use magnetism or electrical charge to store data. It can be done using light, or more rather, the reflection of it. Okay, if you want to be really specific, it's done using the interference of infrared and visible electromagnetic waves, but let's not worry too much about that!