4/18/20 Hi I made i huge mistake, i accidentally removed the Next cloud docker. now when I installed again, it wont open the web UI. please i don't want to loose all my content. I know everything is backed up in disk1. 
how do i restore my nextcould docker or any docker. 4/19/20 I couldn’t wait and installed the docker again but it won’t let me access the webUI. I had to save a copy of the next cloud appdata and deleted the next cloud appdata. Installed again next could from scratch With Mariadb and let incript using the old usernames and password hopefully I will get the same old next cloud. Unfortunately it didn’t let me use the old username, so I created a new one. 
after I finished installing, Nextcloud was just a fresh install. 
how do I restore my old data?

 

your files are safe if you only deleted the docker you can head to nextcloud folder then you should see users folders and inside is the data

Yes. I do see all the files. In disk 1. But when I log in to my next cloud from the web or iPhone. I don’t see this files. I made sure the new Nextcloud has the same share folder as before. So how do I get this folders to show in my NCloud webUI without uploading them again form the web. It will take days. 
why when I transfer this data using Krusader from disk1 to user/Nextcloud share folder it doesn’t show in Nextcloud! It only work one way 

It there a fast way to transfer files to next cloud. Uploading large file from the web takes forever. 

I don't believe it's good practice to transfer between Disks and Shares.

 

A quick way to re-sync your files from Share to Nextcloud gui;

Docker > Nextcloud > Console

Type "occ files:scan --all" (without ") and press enter

 

This will re-scan the drive and update the Web UI.