Saving data to a USB
I have a 2018 MacBook Air 13 inch laptop. I'm having difficulty in saving data to a USB. I'm told that my particular model does not have Save As Function. Apparently the older and later models do have a Save As Function. I'm using pages and want to back up my work. I tried the click and drag function to the USB icon that i placed on desktop but my work disappeared from the pages file. Can anyone advise onhow to save to a USB please?
MacBook Air 13″, macOS 10.15