碟盘存储（英语：Disk storage，或 Disc storage），一种保存数据的机制，它将模拟数据或数字数据存放在一个或多个经过特殊处理的圆盘表面，通过旋转圆盘的方式，来取出数据。根据它的保存媒介，又可以分成电子式、磁性式、光学式或机械式等。这类设备，最著名的就是磁盘，如软碟（floppy disk，FD）、硬盘（hard disk，HD）以及黑胶唱片、光盘（optical dis）等。碟盘驱动程序（disk drive）是用来控制这类硬件装制的软件驱动。

Disk storage is a general category of storage mechanisms where data are recorded by various electronic, magnetic, optical, or mechanical changes to a surface layer of one or more rotating disks. A disk drive is a device implementing such a storage mechanism. Notable types are the hard disk drive (HDD) containing a non-removable disk, the floppy disk drive (FDD) and its removable floppy disk, and various optical disc drives and associated optical disc media.