I was logged out and then all the maps and resource packs are gone

Just like other days, I was about to play minecraft.

However I found that I was logged out somehow and I can't see any of my maps.

So I logged in Xbox, but still I can't see any of my maps, resourse pack or customized skin.

What is going on??

I have been playing so hard these few weeks and everything just disappeared.

I looked for files, but the world files are not where it should be.

There is only one server I was playing year ago, which hadn't appear for few months already.

I need some help on how to fix this problem and get my servers back.