I've been reading up on Raids today. I think that I should invest in a drobo, is this a good option for safely backing up my data? It doesn't need to be wireless. I'd like to be able to access the data fast though.
A RAID isn't necessary for backups if what you're backing up is available elsewhere. For instance, if you're making a Time Machine backup of your system, a Drobo may be overkill. Just one physical drive would be sufficient assuming it had the space. The thought process is that it is highly unlikely that both your original (computer) and backup (external drive) are destroyed at the same time. When one bites the dust, you'll have time to procure a replacement and restore/recreate the backup.
RAID setups are encouraged for 3 reasons:
1) To improve throughput by channeling drives.
2) To build a volume larger than the individual drives (>2TB)
3) To provide a failsafe drive (or drives) to keep data online in the event of a failure.
RAID is not a backup. I run a ReadyNAS in RAID5, and a OpenNAS in RAID1. Both have a separate external drive for backups.
If all your data exists on your system already, RAID is overkill.
If the RAID is where the only copy of data will be, you should have a backup for the RAID too.