This B&H Kit bundles two WD 4TB Purple 5400 rpm SATA III 3.5" Internal Surveillance HDD Retail Kit for a total storage capacity of 8TB. These drives are specially designed to withstand the stresses placed on them in a 24/7 surveillance system.
Compatible with Mac OS X Mountain Lion, Lion, and Snow Leopard
Please bear in mind that Windows XP does not support drives with capacities greater than 2TB. Compatibility may vary depending on user's hardware configuration and operating system