Probably not the actual content, hopefully, but more than likely the file types, length, size, frequency, every other variable so they can sell it. Probably to people making software to store or back up files so they know user habits and expectations. But that's obviously the most innocent framing, I'm sure there's a darker side somewhere.
I don't think they'll come out publicly with the full extent of what is used, but basically everything.
I just assume everything. Any way you think they can monetize what they can see of yours, they do. And more that you can't think of.
Probably not the actual content, hopefully, but more than likely the file types, length, size, frequency, every other variable so they can sell it. Probably to people making software to store or back up files so they know user habits and expectations. But that's obviously the most innocent framing, I'm sure there's a darker side somewhere.