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The config folder on flash has all of your configuration. Backup and restore config folder

Attach Diagnostics to your NEXT post in this thread.

Attach Diagnostics to your NEXT post in this thread.

Try to use the same flash drive so you don't have to do a license transfer.

Repairing the filesystem will not fix that. But it will allow you to rebuild a mountable filesystem now. Looks like repair didn't create any lost+found, and the emulated disks are mounted with plenty of data. You can rebuild both at the same time. https://docs.unraid.net/unraid-os/manual/storage-management/#rebuilding-a-drive-onto-itself

https://forums.unraid.net/topic/48707-additional-scripts-for-userscripts-plugin/?do=findComment&comment=480177

USB not recommended for array or pools for many reasons.

Corrupt docker.img. Seems unlikely that you would have filled it though. Have you done memtest? If not, you might do that before anything else just in case. You never want to run any computer unless memory is working perfectly. You will have to delete, recreate, reinstall docker, but we will get to that later. Your appdata and system shares have files on the array. Ideally, appdata, domains, system shares would have all files on cache or other fast pool, with nothing on the array, so Dockers/VMs will perform better, and so array disks can spin down since these files are always open. Nothing can move or delete open files, so you will have to disable Docker and VM Manager in Settings before you can work with these. Then set these shares to Primary:cache; Secondary:array; Mover action:array->cache. Then run Mover, wait for it to finish, and post new diagnostics.

Can you try transfer from a different computer?

So your plex server has to get media across the network before it can serve them. I don't see how this can be a good configuration for multiple streams.

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You shouldn't even attempt to run any computer unless RAM is working perfectly. Everything goes through RAM, the OS and other executable code, your data, everything. The CPU can't do anything with anything until it is loaded into RAM.

This

Do you mean your Plex Server is not your Unraid server?

The link is about changes to make in your BIOS to make your Ryzen server more stable. Do you know how to access your BIOS?