FORT DIX, N.J. — A federal prison inmate serving a lengthy sentence for trafficking in child pornography has admitted possessing a removable storage card that contained dozens of child porn images.

Federal prosecutors in New Jersey say Erik Smith pleaded guilty Wednesday. The 36-year-old Iron Mountain, Michigan, man is now serving a 19-year sentence at Fort Dix and could receive an additional 20-year term when he’s sentenced in February.

Prosecutors say the memory card contained 263 child porn images, mostly of young boys. Smith admits he downloaded those and other child porn images from a cloud account on behalf of other inmates.

Smith was one of five Fort Dix inmates accused in April of using storage cards and contraband cellphones to share child pornography inside the prison.