This eMMC comes preinstalled with an OS. However, if you wish to back up this eMMC to your computer or write a new OS image to it, you'll need a way to hook it up to another computer with one of the two following solutions:
eMMC storage performance Sequential read and write speed is over 150MB/s and 125MB/s respectively. 4K random access performance is reasonably fast too. io zone test result are as follows.