I using liberkey from harddisk with 5 PC's at home and work. I installing it only 1 time and sync the folder with an app called dropbox. If I change any file at one PC it will be change direct at all other PC's.
The syncing is very fast because it syncs not the complete file, only the changing piece of the file will be sync and that is most only some bits.
If I instal a new app, minutes later the app is ready at all other PC's. When I am deleting an app it was deleted at al PC's. When I am add a new bookmark in my browser, one minute later it is at all PC's added.
You protect your liberkey with true crypt? No problem. Drop box synct your closed container, and only the changes inside, not complete. Unbelievable.
For someone it will be interest, what I wrote.
Sorry for my bad English.
https://www.dropbox.com/