|Standard, high-capacity laptop external hard drives accommodate up to 500 GB, with 1 TB and 2TB units also available. They are compatible with Microsoft Windows 2000, Microsoft Windows XP, Microsoft Windows Vista, and Apple Mac OS X (10.4.8 or later) operating systems. Numerous laptop external hard drives are "Compatible with Windows 7" software, and are certified with Microsoft’s assurance that the device has passed tests for compatibility and reliability; with 32-bit and 64-bit Windows 7.|
Various notebook external hard drives are CE and RoHS compliant. RoHS compliant devices are tested for an extensive list of hazardous chemicals that may be incorporated in the manufacturing of electronics and electronic components. All electronics, such as a laptop external hard drive, sold within the EEA and EU, must be tested for RoHS standards and pass their inspection. The CE marking is also mandatory on notebook external hard drives and electronics within the European Union, and verifies that a product has met all EU consumer safety, health or environmental requirements.
Most laptop external hard drives have a standard power requirement of 120/230 V AC (50/60 Hz). The transfer rate for a device with Hi-Speed USB interfacing is an estimated 480 Mbps. Laptop external hard drives with FireWire 400 connectivity have a transfer rate of 400 Mbps, and 800Mbps for FireWire 800 connections. Devices with a 500 GB capacity have an average weight of about 6.0 - 8.0 ounces, and feature a thin enclosure of 3.75 in x 0.6 in x 5.6 in. 1 TB and 2 TB laptop external hard drives weigh between 2.5 - 40 lbs, depending on the features and individual brand. They maintain a compact enclosure design, and are equipped exclusive protection features, such as BlowFish 448, and Fire/Water Proof casings.
If you have questions about the compatibility and availability of a specific external hard drive for your laptop, contact the manufacturer or an authorized laptop repair service center.