|Hard Disk Size: at least '''160GB''' ''(250 - 500 GB preferred)''.<br />'''Please buy the tray from ACS or the bookstore''' as not all trays are compatible.<br /><br />Mechanical shock from dropping a hard drive causes drive failure for several students each semester. If you use a mechanical hard drive, be careful not to drop it, and transport it in a padded container (e.g., a neoprene netbook sleeve, available from some dollar stores).<br /><br />Hard drives are currently expensive due to flooding in Thailand. Solid state disks (SSDs) are becoming competitive in price, are faster, and are less susceptible to shock, so you may want to look for a deal on an SSD instead of a hard drive -- but check to ensure that your SSD will fit properly into your drive tray.<br /><br />Please tighten the drive screws securely to prevent the tray from jamming in the holder, or leave the screws off.<br /><br />