How much data can a single layer, single sided DVD can store?

How much data can a single layer, single sided DVD can store?

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Explanation

A standard single-sided, single-layer DVD holds 4.7 GB of data.

double-layer DVD can store up to 9.4 GB.

single-layer HD-DVD holds 15 GB of data.

dual-layer HD-DVD provides up to 30 GB of storage capacity.