For a good DR strategy, it has to be either tape or some other media that can be taken offline and shipped to offsite storage. Tape is generally easier to deal with for offsite storage and more durable for transport - but any removable media will do.
When the prices come down, and the capacity goes up a bit - I can see SSD drives as ideal offsite media.
Jeffrey Williams
“We are all faced with a series of great opportunities brilliantly disguised as impossible situations.”
― Charles R. Swindoll
How to post questions to get better answers faster
Managing Transaction Logs