A childcare worker has been charged after an investigation into child abuse material unearthed more than 550,000 images.
Australian Federal Police on June 20 seized several electronic devices from the home of the accused, who cannot be named due to a court order.
About 1.4 million files were identified on these devices, including 550,000 unique images.
"The number of files does not provide any indication of the scale of the alleged offending," Detective Superintendent Luke Needham said in a statement on Thursday.
"Rather, this indicates the volume of work required by investigators from the AFP's Victim Identification Team."
The man, aged in his 30s, was charged on July 10, Australian Federal Police confirmed.
He is due to face Parramatta Local Court on Friday on seven counts of using a child to make abusive material.
An eighth charge relates to the transmission of child abuse material.
Officers continue to methodically review the electronic material, Det Supt Needham said.
Asked by reporters, NSW cabinet minister Rose Jackson said she was not aware of the case, "although that sounds incredibly problematic."
The man's identity and his prior places of employment cannot be published until the case progresses further through the local court.
That order was made to protect alleged victims from psychological harm and to avoid causing undue distress to them, their parents and carers and to alleged victims not yet identified by police.
The childcare sector and governments of all levels are reckoning with a crisis of confidence following horrifying allegations of abuse.
Victorian childcare worker Joshua Dale Brown was charged with sexually abusing eight children under the age of two.
A slew of separate accusations have since been made against childcare workers in other states, fuelling calls for action.
The federal government has unveiled a website to name and shame early learning centres that breach child safety laws and passed reforms to strip childcare providers of their funding if they fail to meet quality, safety and compliance standards.
But many issues relating to the enforcement of childcare centres rests with the states.
The NSW government on Wednesday announced a plethora of changes designed to strengthen children's safety including supersized penalties for large childcare providers, more powers for the sector's regulator and reforms to improve transparency for parents.
