Cost-effective datacenter storage delivers the right blend of performance, reliability and capacity and keeps your total cost of ownership low. 5 year limited warranty. Ideal for bulk cloud storage, replicated environments, content delivery networks (CDNs), SMB to high-end network attached storage (NAS), backup and archiving. 4 TB capacity holds up to 800,000 digital photos, 1,000,000 MP3 files, and 300 hours of HD video. MTBF: 1,000,000 hoursMTBF for 1-5 bay NAS: 1,200,000 hours.