What is best to back data up these days?
 

you can get 64gb flash drives for the same cost only a few years ago a 64mb flash drive cost.

so what is best and why?

I've used the online cloud services and probably still will for a few things, but I picked one of these up a few days ago and now have a 3TB Personal Cloud that syncs all my computers, feeds my media center, holds Time Machine backups of my Macs and acts as my own personal Dropbox all for under $200.

http://cdn2.ubergizmo.com/wp-content...-HDD-cloud.jpg

Floppies

Local backup, at least two sets, one rotated and kept offsite.

Cloud backup for additional data security in the case of a SNAFU.

print everything. scan it when you need it.

Flash drive with online backup. I do that for my site content and designs.

Zip Disks