HDD, thumbs, BD, online, d

HDD, thumbs, BD, online, depending on size, structure and money.

As birdcat says, you can use DVD for smaller projects.

What’s more interesting, you may write your HD work on a DVD not only as a file.

You may create a Blu-ray project with a menu, export it to an .iso file and burn it on a blank DVD. It will play with full functionalityon standart BD players and, of course on any comp as well.