After I powered off the server, run a check disk on it and plugged it back everything was back to normal, maybe the flash drive was corrupted, although the check said the drive was okay.
I'm still worried, when that happened everything looked good: the array was running with green dots for every drive, all the plugins were still installed and I had access to the flash drive through the network
I only noticed something was wrong because the Main page said all the drives were empty and all of the Shares were gone.
Any idea what could have done it? and is there a plugin that automatically backup the flash drive in case this happens again and won't fix itself?
Thanks