This. The JPEG file is 819 kB of compressed data, but when it's uncompressed (as it must be to make it viewable) it occupies 5. 49 MB of memory. That implies a compression ratio of around 7:1, which is quite typical for high quality JPEGs.Compressed v. uncompressed sizes....
Compressed v. uncompressed sizes
Thanks for agreeing with what I said ...The JPEG file is 819 kB of compressed data ...