A: Yes. You need a genuine 64GB card. A 32GB card will not work, and a 128GB card will work, but you will have 64GB of unallocated space that requires manual partition merging (advanced users only).
Your Complete Guide to Download, Installation, and Optimization Cobalto V7 - 64gb - Recalbox 8.1.1 - Raspberry Pi3 Download
If you have a dusty Pi 3 sitting in a drawer, download Cobalto V7. Flash it. Plug in a controller. And for the first time, just play . Q: Will this work on Raspberry Pi 4? A: No. The bootloader is different. You would need to manually replace the kernel and firmware files from the official Recalbox Pi4 build. A: Yes
A: Not recommended. An online update will overwrite Cobalto's custom theme and core optimizations and likely break the bezels. Stay on 8.1.1 for stability. And for the first time, just play