The .DAA file extension stands for 'Direct Access Archive' and was created by PowerISO Computing for their CD/DVD image file-processing tool "PowerISO".
Unlike the majority of CD/DVD image formats, the PowerISO's .daa format allows advanced features such as file compression, password protection, encryption and the ability to split files in to multiple volumes. Due to these advanced features.
PowerISO is the only software package that can read .daa files. PowerISO is a fairly easy-to-use application that uses a simple drag-and-drop user interface and the (now standard) ability to copy/paste from the clipboard. PowerISO also supports shell integration (command line interface and scripting).
One of the main features of PowerISO is that it allows you to open, create (up to 64GB), edit and extract ISO files, allowing you to create backups of your valuable CD/DVD-Roms or to simply create CD/DVDs from files on your hard disk. Also, as PowerISO can recognise the majority of image file formats, you could convert your CD/DVD-Rom image collection over to the standard ISO format.