It is just data (collection of bytes), you can just store, it or process it, your call.
Perhaps if you're unfamiliar, you could write some PC side software, using basic File IO and process and digest the data until you are comfortable with managing it and manipulating it, and then migrate the working understanding into your embedded platform.
Once you've staged the data in the holding location (0x08015000) you can move it elsewhere to replace the code at 0x08000000
.HEX files will typically be about 2.5x larger than the binary data they are describing. So inefficient to transmit over the network, and to stage on the device.
