There is a backup. It’s astonishing how many people don’t seem to know this. If you cut internet to the terminal you can make offline payments and they’re stored for 24 hours. I do IT for a retail chain that uses square and we did this. People can still buy stuff just fine (as long as its under $200 in one transaction)

They’re still down and just put out a statement that they’re still looking for the root cause, which is unbelievable to me that after 9 hours they don’t know what happened.