Can't update, error 80070308

Check with your drive manufacturer for any tool they may have - I agree, Seatools isn't any use for SSD's

That's better than nothing - I'll see if any of the hardware guys know the best way.
What's the make and model of SSD? - presumably the SanDiskSDSSDHP256G from your specs?

Have you made sure the firmware for the SSD is up to date? I'm not familiar with SanDisk, but their toolbox should have something to tell you the health of the drive. It may also have a firmware update function also. Most of the SSD Tool Boxes do.

Yes, that's a standard CYA statement made by all of them. The same with BIOS updates. They tell you to update the firmware to resolve problems then say stuff like that. I have 8 SSDs by different manufacturers and they all say the same thing. But, the only reason they come out with firmware updates is usually to resolve problems they have identified with the SSD. So, you make the decision, but I would update it. But, in the end, it's your decision to make.

Just out of curiosity you mentioned the Kaspersky licence was running out and a little later mentioned Comodo so how many AV's have you running.

Now as along time user of Kaspersky I can tell you it will NOT "play" with other AV's without problems - the only one real time AV that it will tolerate is Malwarebytes but even that has a problem to get going but does run.

As for using Seatools for an SSD I found this
My Solid State Drive may be defective, how can I test it? whether this pertains to Seagate SSD drives only I am not sure