I have a dedicated server for accounts I host. Is there any reason why I can't back up to my PC or personal external hard drive at home? If you reject this idea, what do you suggest for inexpensive backup around 10g?
I can recommend bqbackup. You can get 10GB for $5 there, which can't really be beat (not for the quality, connectivity, and uptime that they have anyway). I've gone from 10GB, to 20GB, to 100+GB over 2+ years and it's been fantastic the entire time. Highly recommended.
Have you asked your current host? Many hosts also offer remote FTP backup solutions, which would be a perfect option for you.
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Host Ultra hits the nail on the head. Backing up is no problem at all, however restoring is when things get bad.
Most xDSL or cable connections are limited to 1Mbit of upstream bandwidth. This means that restoring an 160GB drive will take 350 hours (!!). Thats two weeks. I dont think you want your servers to be offline as long as that, do you?