Adding hard drive capacity to your printer will increase processing speed for large, complex files. It also creates storage space for frequently printed documents. Advanced printing features may be accessed with additional memory capacity. Drive Type: Internal Hard Disk; Maximum Compressed Data Capacity: N/A; Maximum Native Data Capacity: 250.0 GB; For Use With: Samsung ML-5512, ML6512, ML-5012, ML-5017 Monochromatic Laser Printers.