Pay up or Grandma’s photos of her grandkids are toast.

That’s the threat being laid down by a hacker or hackers who claim to have access to as many as 300 million iCloud and Apple email accounts.

The hackers, who call themselves “Turkish Crime Family,” want Apple to pay a ransom of $75,000 to $100,000 in exchange for not deleting the contents of the accounts.

“I just want my money and thought this would be an interesting report that a lot of Apple customers would be interested in reading and hearing,” one of the hackers told Motherboard, the Vice Media online magazine.

So far, Apple has told the hackers to take a hike — telling them in an email seen by Motherboard that the Cupertino, Calif., company does not “reward cyber criminals for breaking the law.”

The hackers are threatening to hit Delete on April 7.

The group doesn’t want the ransom in good old American greenbacks — perhaps knowing it would be too easy to trace.

They want either $75,000 in bitcoin or ethereum, another increasingly popular crypto-currency, or $100,000 worth of iTunes gift cards.

To prove they actually could carry out such a hack, the group uploaded a YouTube video of them allegedly logging into some of the stolen accounts, Motherboard reported.

The hacker appears to access an elderly woman’s iCloud account, which includes backed-up photos, and the ability to remotely wipe the device.

Apple did not reply to multiple attempts by Motherboard to get comment.