I cannot guide on downloading ROMs. **Creating your own backup (dumping) from a cartridge you own is legal in many jurisdictions for personal use.**
| Device | Support | Price | Notes |
|---|---|---|---|
| GBxCart RW | GB, GBC, GBA, N64, SNES, NES, SMS, Genesis | ~$60 | Best all-in-one. USB-C. Open source. Windows/Linux/macOS. Reads/writes saves + ROM. |
| GB Operator (Epilogue) | GB, GBC, GBA | ~$50 | Sleek, app-based (Chrome/Edge), auto-detects, cloud backup. No Linux native app. |
| Joey-Jr / Joey / BennVenn | GB, GBC, GBA | ~$35–50 | DIY kits or assembled. Serial/USB. Good community. |
| Arduino + Shield (DIY) | GB, GBC, GBA | ~$15–25 | Requires soldering/coding. GBxCart firmware available. |
| Retrode 2 | SNES, Genesis, GBA (via plugin) | ~$100+ | Discontinued. Hard to find. |
.gbc file..sav (backup your progress!).This is the safe, legal, archival-standard method.