you are WRONG iso size is 4,699,979,776 bytes.
Any media will work, but I dont advise using blank disk(silvers) without a name....they are cheap and some are bad before you ever touch them.
-R's are recommended, but you can use + R's
And thats got to do with burners and compatibilty and nothing to do with the wii.
They will not hurt your laser, thats a myth.
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