Sapphire Combo Blu-ray/HDD and DVD-RRW/HDD combine optical and hard drive storage into one package to address situations requiring addition of optical storage capability or external storage to computing devices via eSATA or USB 3.0 connection. Both models let users play movies or access data stored on all optical media as well as burn video/data onto DVDs or CDs. Snap-In Mobile Rack allows any 3.5 in. SATA HDD to be added or removed from Sapphire drive, and encryption capability is optional.