I've had two 1 terrabyte drives fail in the last two years so have scrapped backing them up on external drives

I use DVDs (more space), need to go through and re-organise them again & burn onto different dvds (ran out of re-writable ones), I also have a laptop that has a 500gig hard drive in it which has the most recent photos on there (using iPhoto - it is a MAC) most recent ones were synched from my phone while on holidays.
EEEK! we used to back up on DVD's but when I went back to use a few of them they were scratched and we lots a lot of pics... Seems there's no easy answer!