I was of the mind to buy an external hard drive and store it in my fire-proof lock-box at the house, and more recently though to maybe use an external or even internal Solid State Disc (that is, flash memory) since it is more durable. A coworker of mine also suggested using standard USB flash drives instead, and I thought "that's perfect!"
Benefits for usage as a backup device:
- Tiny physical size, easy to store multiple
- Available in large sizes for great prices (32 GB for $16!)
- Very durable (shock resistant, water resistant)
- Good transfer speeds (SATA III speeds not necessary for a once-per-month backup routine)
- If more space is needed in a couple years, you can add or replace for even cheaper
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233158
Now I just have to figure out a way to either sync or setup easy manual back-up process...