Drobo's latest generation
Frank I Reiter wrote:
I believe you can put your drives into any Drobo enough or more than enough drive bays, and even switching between nas and das if you wish to.
Just got an email from DRobo confirming what you said:
Already have a Drobo FS? You can move your disk pack to the Drobo 5N and experience greatly enhanced performance. Even better, expand your data protection with a new 5N as your primary with the latest fast drives, then use your FS as an onsite or offsite backup and get the 3-2-1 you need.
There is more information on migration at: