Try formatting the cards before you use them either in camera or in a reader, though I suspect this sounds terminal. The D70 is a very early DSLR you may want to try here http://www.ffordes.com/category/Digi...tal_SLRs/Nikon
to get a replacement. The good thing about Nikon is that almost all their cameras are backward compatible so any lenses that work on the D70 will be compatible with recent models.
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