Basically pendrive/flash drive/thumb drive/usb Flast drive are products build from a memory technology called as Flash memory. Manufacturers use these different terms for their flash memory based products.
So a pendrive is nothing but a Flash memory with a USB interface. The memory cards used in your mobiles are also based on flash memory. only their their interface is different.
A flash drive is a storage device that uses flash memory rather than conventional spinning platters to store data.
Sometimes referred to as a jumpdrive, the pen drive is a portable USB flash memory device that can be used to quickly transfer audio, video, and data files from the hard drive of one computer to another. With a construction that is small enough to fit into a pocket, the pen drive derives its name from the fact that many of these USB drive devices resemble a small pen or pencil in size and shape.
That 32GB kingston is a big scam. Even here in China, shopkeepers are advising against kingston. Most of them stock sandisk, pny and others and only a few have kingston. Here kingston pen drives are available in subways stations, these guys just put a paper on the floor and display those 32g, 64g, 128g and even 320g pen drives