It's strange that you ask this question. You can use anything you want to install. You must use a hard disk to install it. No one cares that your CD is more portable than your hard disk, but it is not conducive to long-term preservation of infrequent files, such as important files. There is also a large disc, which is convenient for collection and viewing. And wedding CDs are engraved. No one has ever seen enough money to get a hard drive directly. For example, what documents do you need? I put them here. I can't help you remove the hard drive. If I don't have a USB flash drive, I can only carve a disk for you. Anyway, the cost is only a few cents.