That looks just like my plum tree - sorry, I forgot what variety I planted.
Mine don't get a lot bigger than that but they are very sweet and there are TONS of them. This year I put up several jars of plums packed in brandy with bit of raw sugar.
I also make a tart plum spread that I freeze. I don't like to add a lot of sugar so that leaves out jams.
Also have several bags of pitted plums in the freezer with a bit of raw sugar added. I bake them into
coffee cakes, puree and top on oatmeal, etc.