Field after "where" with numbers and spaces

[LSKY03]

Hi! It's the first time I post here so I apologize in advance if I do something wrong.
I'm trying to exclude some files from a query, so I'm using "where".
I don't want to see the files from a folder called "90 - Templates" as they're templates, and I don't need them nor I want to modify them by accident.
Having said that, the line I've written inside the Dataview query looks like this:
WHERE file.folder != "90 - Templates"
So where the folder that contains that files is not equal to 90 - Templates.
However this doesn't work, I suppose because of the spaces. I've seen the documentation but "90---templates" doesn't seem right. I tried to use the row field but maybe I used it in the wrong way.
I tried rendering spaces as in HTML with %20 but it doesn't work.
What can I do? Is it possible to do what I want? Thanks in advance everyone!
(English is not my mother tongue so I'm sorry for potential mistakes)

[AB1908]

Try contains(file.folder, "folder name")

[blacksmithgu]

Specifically,

WHERE !contains(file.folder, "90 - Templates")

[LSKY03]

Thank you!!