Keep in mind if choosing offline storage, there are 3 main types: Optical, Mechanical and Flash
- Flash ie a thumb drive or SSD has a very short life (about 1000 writes but depends on quality/brand). The advantage is they are very fast, but I would strongly recommend against them for long term storage or heavy use unless you have a good 2nd copy. Don't expect a heavily used flash drive to last more than a couple of years. I have had failures at work around 1:100 range in the first year.
- Mechanical hard drives have a long history of being reliable, and it is not uncommon for drives to last 7-10 years of regular use. Portable hard drives like some of the models above are a good middle of the road storage. I have had failures around 1:10000 range in the first year.
- Optical storage like CD, DVD and Blueray have been tested to have real world shelf life measured in decades. They are slower and smaller but ideal for very long term storage. I have never in my life seen an optical disk fail if it tested fine after being burned except when scratched by the user.
Just remember if you are using it as a backup solution:
Two copies are one
and one copy is none
Rob
rvtechwithrvrob.com