Flash drives use different technology, are a lot slower, less reliable, and generally less expensive than an SSD, but as far as macOS and any applications such as Super Duper or CCC are concerned they are just another drive and can be named and formatted just like any other drive mounted on the system. If your computer has a slot for an SD card, you could use something like this. If you do not have an SD slot and you have a Type A USB port then you need a thumb drive like this. If you have an unused Type C port then you would need something like this or for maximum performance, longevity and reliability, I would get a full blown SSD like this.

Remember this, SD cards and thumb drives are very much a commodity market where you get what you paid for. All too often, cheap, off-brand, SD Cards and Thumb drives aren't worth what you paid for them.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein