Braulio Dias Ribeiro's post in Erro Array was marked as the answer
I honestly don't know how I did it.
In the folder settings (share) it says:
Primary storage (for new files and folders): Array
But the Vms_pool also has the folder. I executed some containers and maybe I created a folder in this pool.
I'll try deleting it to see if it works (this folder is just a test, it doesn't contain any important data).
Thanks for the explanation, and I'll learn how to read this diagnostics.
@Frank1940@agarkauskas
I restarted the server and it worked again.
I didn't have to do anything.
Maybe the files were not moved from the pendrive due to permissions or maybe only what was in the memory was moved.
Tks for your help