what can I use to replace my time capsule
What do I use to replace my time capsule that just died?
Another Time Capsule, if you like Apple products. Check eBay for new, refurbished and used Time Capsules.
Otherwise, the simplest, cheapest, fastest and by far the most reliable way to back up would be to connect a USB hard drive directly to your Mac.
If you want a much more complicated and expensive solution, post back.