Disk recorders give professional video teams longer record times, higher quality codecs and more flexible workflows than in camera recording alone. This category covers rack mount and standalone recorders that capture SDI and HDMI feeds direct to SSDs or other removable media, often with options for ProRes, DNx and high bit rate H.264 or H.265. It is aimed at broadcast engineers, live event crews and production companies who need reliable ingest, programme records, ISO feeds and playout for studios, OB trucks and venues. A common question is why invest in a dedicated recorder when cameras already record internally. In practice, external recorders provide better codec choices, longer uninterrupted clips and easier integration with post production. Another frequent concern is redundancy. Many units support dual slots or mirrored recording so that a backup copy is created in real time, protecting critical shows and one off events.