Forensic analysis of the devices allegedly revealed an extensive web of alleged child sex offenders across three states, prompting the formation of the AFP-led Operation Arkstone.
Investigators have now charged Mr Radford with a further 80 child sexual abuse offences, including using a child under 14 years of age for the production of child abuse material and sexual touching of victims under the age of 10.
Mr Radford appeared at Wyong Local Court on Tuesday, where he received the new charges, which relate to a child who is known to him.
Police will allege material on his electronic devices contained evidence he was abusing the child, recording it and sharing images or footage online with others.
AFP Detective Sergeant Joel Wheeler said investigators, digital forensics specialists and Interpol-trained victim identification experts had identified alleged perpetrators and victims linked to the network.
“They had to comb hours of disturbing content looking for clues to find these people allegedly preying on Australian children, to bring them to justice,” he said.
“We are continuing to try to identify others who are involved in this disturbing [alleged] network, and hunt them down and unmask them from the anonymity of the internet and put them before the courts.”
In June two men, aged 21 and 26, from the NSW Mid-North Coast were also arrested as part of Operation Arkstone, following a tip from US authorities.
The men were arrested in Old Bar and Kendall. At the time police confirmed the arrests were not related to the investigation into the disappearance of William Tyrrell who went missing from Kendall in 2014.
Another six men from NSW, Queensland and Western Australia have also previously been charged, including a 19-year-old man with 208 offences, including the sexual abuse of five boys.
Operation Arkstone is ongoing and investigators believe further victims and offenders will be identified.