Video compression has its place with some applications, but when a critical experiment is underway and the best possible video quality is required, experts turn to the DVR Express® Core series. These powerful recorders store high-bandwidth uncompressed video data from one or more cameras, preserving all the detail and dynamic range of the original digital video data. This allows frame-by-frame review of recordings as though each frame is its own still picture. After the recording is complete, clips can be exported into formats that do support compression, such as AVI or JPG, but the original data is always preserved. The DVR Express Core incorporates a removable cartridge (Drive Shuttle) holding up to four solid-state drives built with NAND flash technology. Using solid-state media ensures reliable continuous recording with no dropped frames, plus tolerance to shock and vibration. Recording directly to non-volatile storage protects data in the event of a power loss, whereas a RAM-based video recorder would lose the data immediately. Even if no power loss occurs, with non-volatile media there is no download process after each recording finishes (to “save” the recording file) - all frames are already saved the moment they reach the DVR.