second drive

វាជាប្រអប់ដាក់ hard disk SATA ទំហំ (2.5អុីង)​របស់ laptop ដើម្បី រក្សាទុកឯកសារ

is a case for a hard drive which you can mount inside your laptop. … You can use the second storage disk to store your files, music, movies, programs, and games. In most laptops you can set up the second hard drive to boot a second operating system.