data gone and a few follow up questions

Now for the problem, over the weekend some sort of error occurred on the NAS which scrambled the volume. Monday, I was in the GUI, the nas was acting strange, so I did a simple restart, thinking that would solve the problem, but instead when NAS came back online NAS told me that I needed to create a volume because no volume existed. I called netgear, started with tier1, then to tier 2, then 3 and then tier 3 spoke to their “go to engineer” and then engineer worked on it for a while with no luck. I only had 1 volume, 16tb total disk capacity, but the engineer could not find the data, there was about 4-5tb of data and 3-4 worth of snapshots that the engineer should have been able to see. The GUI was showing me 2 volumes, both named volume1 (which was my old volume name). 1 of the volumes present in the GUI show a size of about 10tb, the other showed 0tb. My only options for the volumes that the GUI had was to go to settings and DESTROY the volumes, all other options were greyed out.

Long story short, I basically had to reset the NAS and start from scratch. No that fun. Anyone else have a similar problem?

Tech support was unable to tell me what caused the problem, so I am left wondering what did I do to cause this, is this going to happen again in a couple weeks, was it caused by my specific settings within the NAS…….