NewTech Infosystems (NTI) has introduced Shadow 3.0 backup software, which it claims makes it easier for Mac users to protect valuable data.

The always-on software works in the background to maintain real-time, continuous backup of all changed files to any external storage device, including USB flash and micro drives, internal/external drives, CD or DVD optical, and network attached systems.

Shadow 3.0 ($40) lets users schedule multiple and concurrent backups in the native file format so they can instantly be recovered without additional proprietary recovery software. It also includes an advanced scheduler that allows users to schedule backup start times by minute, hour, day, week or month.

The software includes a new step-by-step wizard to simplify setup and scheduling and also enable real-time, continuous backup of changed files.

Additional features include file filtering for specific file types (audio, picture, video, and document) as well as custom file-type filtering so users can select specific file types for backup.

Users can choose to save an unlimited number of revisions, a specific number of revisions (1-10), or no revisions to ensure backups are always kept in sync with the original file.

NTI Shadow is equipped with the company's Intelligent USB Device Detection to back up jobs to a specific, removable storage device.

A demo version of the software is available for download.