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A laptop hard drive comes as standard equipment with every laptop computer, providing it with long-term memory storage. Portable computers have laptop hard drives with several terabytes of memory. Hard drives can crash or fail, however, or you may want to replace your laptop's hard drive with something bigger and faster to improve the machine's performance and memory storage. You can replace a laptop hard drive with a more advanced one as long as your laptop's motherboard is compatible with the new hard drive.

Major laptop hard drive manufacturers include Western Digital, Seagate, and Hitachi, as well as others. Laptop hard drives differ in size and type of connector and both of these must be appropriate for your laptop. Most newer laptops have a SATA connection, but older ones use PATA instead.