All I know of is Dropbox, SkyDrive (Microsoft), and I think Google+
It depends on the ISP upload speeds. I use Dropbox myself.
By Google+, you mean Google Drive, and by cloud services, you mean filesharing.
I use Cubby.
The only ones I've heard of called filesharing are the sites that are meant for sharing your stuff with other people through secure links. Filesharing to me doesn't mean squat if I'm sharing the files with myself. That's not sharing - That's the opposite of sharingEveryone learned that when they were 2 years old.