Connect your 2.5in laptop's IDE hard drive to a standard 40-pin IDE cable for installation in a desktop or tower PC. This adapter features 44-pin female to 40-pin male connectors, & a power feed. This adapter makes file transfer to/from your laptop to your desktop quick & easy. Just connect your laptop's 2.5in drive to this adapter, & connect the adapter to our USB (Universal Serial Bus) 2.0 to IDE drive adapter. Then plug the USB (Universal Serial Bus) to IDE adapter into an available USB (Universal Serial Bus) port on your desktop. Your 2.5in drive will appear as a logical drive, & allow you to pull files directly back & forth.