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- Inspiron 3477 3277 AIO 1.21.0 System BiosBIOS · 4.17 MB · 12 May 2025BIOS bin—4.17 MB
- Inspiron 3477 3277 AIO 1.21.0 Bios RegionBIOS · 896 KB · 12 May 2025BIOS bin—896 KB
- Inspiron 3477 3277 AIO 1.21.0 EC FirmwareBIOS · 128 KB · 12 May 2025BIOS bin—128 KB