[baronluigi]

Maybe it is because the files are uploaded in a paid account, instead of a free one.

I have myself tested that in the past. I accesed to a blocked link (hosted in a free account) while being logged in a google account, and through a private session at the same time (which are anonymous by default). I was able to perfectly dowload the file through the logged one, while the one in the private tab appeared blocked all the time.