It is important that you have triple protection:
-On the one hand, your hard disks must be in Raid (Raid 1 is good if you have two disks, if you have 4 it is advisable to Raid 5 or 6)
-Then you must have an automatic copy in another disk that you have in your own office, this we have in Raid 0 to save costs
-Against that you must have it in the cloud, in case you suffer a theft. You can use Google drive or Amazon, depending on the number of images you have the costs will be higher or lower.
That's how we at Kraken have it, it's a good investment in peace of mind.