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

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