Best RAID option for old video

I want to create an inexpensive RAID for old video and data. The stuff is very important to me, but I don't need performance, as this is "deep storage." In order to save money, I'm thinking of using 2 500 GB drives and Disk Utility.
What would be your preferred RAID option and why? Thanks.

I would say RAID 1 "mirrored".
Your data would be stored on both disks and if you had a failure with one disk.
quote from Disk Utility Help:
+About mirrored RAID sets+
+To help protect your data against disk failure, you can create a mirrored RAID set, also called RAID 1. In a mirrored RAID set, your data is written to two or more disks at once. If one of the disks fails or is disconnected, your computer can still access the data from the other disks. If you reconnect a disk you disconnected, the RAID set can rebuild it in the background so that it contains the latest data.+
+You can add spare disks to the set, called hot spares, that aren’t written to unless another disk fails or is disconnected. The RAID set then rebuilds one of the hot spares. If you reconnect a disk after the RAID replaces it with a hot spare, the reconnected disk is treated as a hot spare.+
+You can choose to have the RAID set rebuild a reconnected spare disk automatically. Otherwise, you must rebuild it yourself.+
+You still need to back up your data regularly, even though you have a mirrored RAID set. Mirroring protects you from some types of hardware failure, but not from user errors or software corruption. If you delete a file, it’s deleted from the mirror as well. If software corrupts a file, it’s also corrupted on the mirror.+
Message was edited by: David Altonaga

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