An always - on home server loses a lot of its usefulness if you need to go manually turn on the backup, photo, or music services, after all. (howtogeek.com)
You'll also need to run your own home server for this. (howtogeek.com)
It may not be as feature - filled as a full home server, but it can do quite a bit — all for just the cost of a USB drive. (howtogeek.com)