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MajorGeeks.Com » Overview» Tutorials and Video Guides » What's the Difference Between Dual-Layer and Double-Sided DVD's?

What's the Difference Between Dual-Layer and Double-Sided DVD's?

By Timothy Tibbetts

on 06/15/2023

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Computer storage has become larger and more affordable. The average hard drive is 1-terabyte and under 50 dollars, while 8-gigabyte flash drives cost only a few dollars. Because of this, the CD and DVD have become relics. The only solution, if you need a DVD, is dual-layer or double-sided DVD's. But what's the difference between the two?

We understand there are situations where you might need a DVD. Should you need a Windows 10 installation DVD, that is now larger than the 4.7 gigabyte DVD storage limit.



Dual-Layer DVDs

Dual-Layer DVDs have one side, but with two layers for a total of 8.5GB.

Double-Sided DVDs

Double-Sided DVDs have two sides, each with one layer. When writing to the other side, you'd flip the DVD over. Double-Sided DVD's can hold about 9.4GB.

Now that you know what you need, there are two more considerations.

Recordable or writeable?

  • Recordable DVDs are strictly storage. Once you've written data to the DVD, it can't be overwritten.
  • Rewriteable DVDs can be erased and overwritten much like a hard drive.

    Rewriteable DVDs have two layers and two sides, so they have much more space than recordable DVDs.

    Because of this, we'd almost always buy dual-layer rewritable DVDs for maximum storage and because you don't need to flip them over. We also tend to stick to known brand names, including TDK, Memorex, Verbatim, and Philipps.

    +R or -R?

    You might also notice -R or +R. That determines how data is written and read, and there's no noticeable difference between the two unless, for some reason, your DVD is incompatible, which is rare.

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