While the packaged media business has declined in recent years - thanks to the popularity of streaming services such as Netflix - there remains a market for physical optical media in both DVD and Blu-ray formats.
The good news is that prices for writable PC and laptop drives (in both formats) have fallen in recent years. Of course, Blu-ray drives offer a far larger capacity than DVD equivalents, with a recordable Blu-ray disc (BD-R) holding 25GB per layer, while dual-layer discs hold 50GB.
As a back-up medium they make a reasonable choice (compared to hard disks or flash media) although set at single-speed, a Blu-ray writer transfers data at 4.5MB per second - meaning that a full write to a 25GN BDR-R disc takes about 90 minutes.
As both internal & external Blu-ray writers are no longer significantly more expensive than DVD+RW, they make for a sound choice if you require an optical drive & writer. And with many now featuring BDXL format support (allowing users to burn more data than 50GB) and writing speeds of 6x they are a good option - especially if you already have Blu-ray library of movies.
DVD+RW continues to soldier on as a trusty and flexible format, with a basic rewritable storage capacity of 4.7 GB. Multi-drives in this format can burn both CDs and DVDs, making them ideal for copying music, video and data files where a physical copy is required to share with family or friends (rather than cloud or flash media storage).
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