Hi @Doug101. I suggest we focus on one board at a time. The information that you are encountering problems with all your boards is interesting, but I think that we will like get too confused if we try to troubleshoot both boards at the same time.
So let's focus on the UNO for now.
When the "Verify code after upload" preference is enabled, after finishing an upload Arduino IDE reads the memory on the Arduino board and compares the read data against the data of the compiled sketch binary file on your computer that was uploaded to the board. When it did that, it found that the data on the Arduino board did not match what should have been there. This means the uploaded program was not written to the memory in the Arduino board during the upload process as expected.
It is possible that a short or external circuitry connected to the Arduino board could cause this type of problem by interfering with the upload process.
Make sure the board is not sitting on anything conductive that could short the contacts on the bottom of the board. Make sure there isn't any conductive debris (e.g., loose beads of solder, strands of wire, or component leads) on the board or on the surface the board is sitting on.
I notice this large blob of solder:
Did you perform a repair on this board at some point, or did it come that way?
If you have another USB cable on hand, try changing the cable. Maybe a damaged or defective USB cable could be the cause. Make sure the USB cable is fully inserted into the USB socket on the board and computer.
If you have a shield or any external circuitry or components connected to your Arduino board, try this experiment:
- Disconnect the USB cable of the Arduino board from your computer.
- Disconnect any shields, modules, external circuitry, etc. from your board.
- Connect the Arduino board to your computer with a USB cable.
Now try uploading a sketch to the board again. Does the upload succeed?
This experiment will determine whether the upload error was caused by interference from your external circuitry. If so, you can then focus your attention on identifying the specific problem with the circuit and resolving it.