Quick Note: this forum is intended for support for the DVD Profiler mobile device.  In the future, general topics like this should go into the General Discussion forum.

When you say "backup a copy of my hard drive partition", that tells me you want to back up everything in case of a drive failure.  In that case, an online backup probably won't be your solution as they tend to back up specific files that you specify and judging on the size of your drive/partition, it could take hours if not days to back up based on your Internet connection speed.

Regardless, it would be a hell of a lot easier to purchase a USB hard drive and back up to that.  If you're only concerned with certain files, a large USB flash drive will do just nicely.

For full partition backups, I would recommend a program that can provide initial full backups plus incremental backups (only changed files).  That way, if you have to restore, you restore the full backup and then the much smaller incremental backups.  One program is Norton Ghost.