We recommend using the current U3 firmware. This page serves as an archive for older versions.
U3Afirmware_126_09192006.hex
U3Afirmware_128_12052006.hex
U3Afirmware_132_01232007.hex
U3Afirmware_136_02222007.hex
U3Afirmware_138_03072007.hex
U3Afirmware_140_04022007.hex
U3Afirmware_141_05032007.hex
U3Bfirmware_144_09112007.hex
U3Bfirmware_149_01212008.hex
U3Cfirmware_102_04092008.hex
U3Cfirmware_103_04222008.hex
U3Cfirmware_104_05292008.hex
U3Cfirmware_107_07292008.hex
U3Cfirmware_108_09052008.hex
U3Cfirmware_109_09162008.hex
U3Cfirmware_111_09222008.hex
U3Cfirmware_112_10132008.hex
U3Cfirmware_124_10262009.hex
U3Cfirmware_132_08192010.hex
U3Cfirmware_144_05022012.hex
U3Bfirmware_152_03072008.hex
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