What is the difference between Blu-ray rewritable discs and Blu-ray recordable?

The recordable disc is called a BD-R. BD-Rs are sector-based, so you can keep writing to it until it's full. (CDs and DVDs can only be written to once, even if you don't use all the available space.)
That's why Blu-ray is such a good archiving tool: you can keep adding to it, but you can't overwrite on the part that was already burned.

The rewritable Blu-ray disc is called a BD-RE, and offers the same large capacity in a disc format that allows for repetitive usage. It can be burned and erased many times.

Subscribe to Ask Dean

If you like what you've read, enter your email address below to receive the latest Ask Dean posts delivered directly to your mail box. Or, if you prefer, you can follow ASKDEAN on Twitter or via RSS Feed.