1080p can be anywhere from 8 GB to as large as 40–60 GB. mHD (or mini HD) encoded in the same resolution but at a lower bitrate and are smaller in size. µHD (or micro HD) fine-tuned AVC+AC3 encoding in an MP4 container aimed at 1 to 3 GB per feature movie, keeping 1920 pixels of horizontal resolution with a 2 to 2.5 Mbit/s.