Free host forum is not reliable

I have a forum last year:
http://jiansenlu.my-forum.net/
which is a free forum hosted at:
http://my-forum.net/
The server is down  for a few months this year. I heard it is for sale.
Now the server is coming back. But no content inside.
I hope it will be recovered in near future.
This reminds me always to have a backup of  my website and on-line files.  I recommend to use WinHTTrack
 http://www.httrack.com/

I also have some websites hosted in some free hosts. The companies keep reminding me to upgrade to  a premium account.  After using so many free web servers, I found Google is the best. But  still having a backup is a best choice in case your account is hacked.