good file/folder sync?

[Derausgewanderte]

I am looking for a good folder sync app. Not very useful apps in the store. I am using SyncBackSE from 2brightsparks on my desktop. I am trying to sync files and folders (including subfolders) from device to/from external hdd, based on a combination of file size and date.

thanks

 

[mutant 9]

try www.syncplicity.com fantastic sync app.

 

[Derausgewanderte]

try www.syncplicity.com fantastic sync app.

thanks, I will give that a try. However, this seems to be cloud syncing. I can already do that with skydrive. My goal is to sync between folders on my RT and an external hdd.