Large storage capacity is ideal for hard drive back-ups, digital images, videos, and more. Write-once format protects important files from erasure and overwrites. Easy to write on smooth surface provides quicker disc labeling. Disk Type: DVD-R; Capacity (Video): 120 min; Recordable Format: ?Write Once? format?may not be altered once data is written to the disc.; Capacity Range (Data): 4.7 GB.