The original 320 GB hard drive is failing in my Acer Laptop 7740-5691. It has a Windows 7 OS, Intel i3 quad core, 4 GB ram, 64 bit and is about 6 years old. I have the 3 recovery disks and applications disc that were made when the laptop was new. The recovery disks seem to work and I plan to use them to install the factory default on a new hard drive. Could someone please let me know what type and size hard drive should be used. Does anyone know if I can I use a Seagate hard drive, whatever brand can be used can it be larger than the 320 Gb. Also does the drive rpm have to be the same as the original. I have read on the Acer Community that If the replacement hard drive is blank it has to be formatted for XP and Vista operating systems. Does a new hard drive for Windows7 have to be formatted before use in the laptop. I would very much appreciate any information and comments you all have. Thank you.