File servers for Android? Do any good file servers exist for Android that do not require root?  Ideally, it'd be nice to just be able to have an SMB share, but the only app I was able to find for this (Samba Filesharing) requires root.

I'm currently using FTPDroid, but it's pretty slow (I'm getting about 200 KB/s downloads on my n600 wifi).  Are there any better options?

I'm using a Verizon Galaxy S3.
If all you want to do is access your device from a Computer, my favourite app is AirDroid. Allows you to browse files file a lot more. Doesn't require root. I've found that I can get 1.5 / 2mb/s on a busy network