Welcome to TrueNAS forums.
Please take a look at the link Joes Rules for just basic guidance on what kind of information we need in order to provide yo some good help.
I will get you started with a few questions I have:
- What version of TrueNAS did you install on the new USB Flash drives?
- How many hard drives do you have?
A few more technical questions:
- Are you able to bootstrap TrueNAS and login to the GUI?
- Can you login to the Console? (the attached monitor and keyboard)? If yes, what is the “entire” output of the command
zpool status - Have you tried to
import and existing pool? If so, what were the messages you received?
If your data is valuable, I recommend that you don’t just mash buttons, take your time and you are going to be asked some questions, provide the answers and we will provide guidance. If you are skeptical, ask about something you are going to try to do. There is no problem with asking for another opinion.
Please use the </> button to encapsulate any text output to preserve the formatting, which is very important for the zpool status output for example.