Capacity may refer to any of the following:
1. When referring to a disc, disk, or drive, capacity or storage capacity is the maximum amount of data a device such as a hard drive can hold. See our disk capacity page for a full explanation and examples.
2. When referring to anything that holds a charge, capacity is the maximum amount of power the device is capable of holding.
3. The capacity is the maximum range of values that can be held in a register.