Western Digital Purple? 4 TB Internal Hard Drive 9cm (3.5) SATA III WD40PURZ Bulk

4 TB storage capacity · 5400 rpm and 64 MB cache · SATA III interface · Storage memory for surveillance systems Exclusive AllFrame technology uses ATA streaming to reduce pixelation errors and video interruptions that can occur when improperly using desktop hard drives as security system storage Desktop hard drives vs hard drives designed for surveillanceThe compatibility of the special WD Purple technology for surveillance environments has been tested in many security systems These hard drives are designed to replace standard desktop hard drives that were not designed for a demanding 24/7 continuous HD surveillance environment Desktop hard drives are designed to operate only at limited intervals and not to withstand high temperatures and high vibration as in most monitoring applications