A:Answer Yes, an SSD uses flash memory to store the data. However, flash comes in various varieties - CF, SD, TF cards, USB thumb drives, etc.
As to USB 3.0 vs 3.1 - that has nothing to do with the memory inside, but the interface used to connect the drive to your computer or device. USB 3.1 is twice as fast as USB 3.0 (5gbps vs 10gbps).