MemStrips (short for "Memory Strips") are evolutions of data sticks. They can contain a very limited amount of data, and are often used for quick transfers. Unlike data sticks, MemStrips are flexible and can be stuck to various surfaces in order to initiate transfers.
"The trick is remembering which virus you loaded onto which strip. That's why I draw emoji on 'em. Then I just have to remember which emoji stands for which virus." - Princess Space Kitten