I had a look at the Lightsail data and I can confirm what saliva_sweet found - it's not JPG data, it's some other data in 1024-byte packets. Other things I found are:
1. The packets seem to be repeating data with bitflips between each packet. I can't see any values that change numerically, and the bitflips seem fairly randomly distributed through the packet, so I don't think it's telemetry. It seems more like the computer is attempting to transmit the same packet again and again, with corruption occurring.
2. I tried splitting the packets at different boundaries - the lowest difference between consecutive packets occurs if you start at 928 bytes into the file.
3. The packets go out of alignment in two different places, by two bytes each time (both are a two byte deletion). If you take the first line of each packet's hexdump and display them one after another, the misalignment places are easy to see.
4. There seem to be two different types of packet. The file initially only contains the first type of packet, and then the second type starts appearing interleaved with the first. It's not a perfect interleave, you sometimes get multiple instances of one type before it flips to the other type.
In summary, it looks more like the repeated transmission of two different 1K packets of data, with random corruption. I'm not sure if a radio fault or a CPU fault would do this, but it's certainly intriguing!