I had one of these in college. It was a good little player. Reasonably inexpensive. One end was a cap that came off and was a full size USB, so that you didn't need to carry around cables.
I'm not going to tell you how long it took me to figure out that the hold switch made the storage mount as read only when plugged into a computer.
I went through a few over the years. Some were this exact brand (in blue or black). Some were basically the same but more square. At first they had built-in storage, but later ones just had a micro SD slot. Some used a AAA battery, some rechargeable. Some had an FM radio tuner built-in.
They were all great. My smartphones ended up replacing them eventually, but it was really nice to have physical buttons. And, in college in the 2010's, it was nice to have a USB drive on me at all times.