Unable to import some wav files

I bought access to audiotests so I could download the wav test files. Some files are imported, but most are lost in action.
They are not in the skipped list. I also tried to forcing the import many times

Hope for some help

How are they tagged? Maybe they are there and you just can’t can’t find them? Do they show up in Sidebar > Browse > Home > Recent Activity > Added?

Did not show before the 4’ attempt. Delete files. Copy again. Wait.
I really don’t know why roon each time decided to skip the same bunch of files.