What are some of the things blank discs can be used for?

I purchased 10 4GB blank discs from Amazon recently for playing Wii ISOs on my modded Wii just to find out Wii ISOs are 4.7GB on average. So, they wouldn't fit on the discs even after being scrubbed. Not worth returning since I only paid 10 dollars but I had the idea to just use them for something else. Any... show more I purchased 10 4GB blank discs from Amazon recently for playing Wii ISOs on my modded Wii just to find out Wii ISOs are 4.7GB on average. So, they wouldn't fit on the discs even after being scrubbed. Not worth returning since I only paid 10 dollars but I had the idea to just use them for something else. Any ideas? What are all the useful things a blank disc is capable of. Excuse any of my obvious signs of lacking knowledge on computers. I'm only at a, maybe, intermediate level with computers from just average usage experience.
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