| Pictured here are two common diskettes, the first is a 720 Kb (Kilobyte) and the second is a 1.44 Mb (Megabyte) | |
 | 720 Kb Diskette Notice: There is only one square hole in the upper right corner. The hole has plastic block that slides from top to the bottom of the hole. This sliding feature allows the disk to be written to or to be write protected. In the closed position the disk is able to be written to. In the open position it is write protected. |
 | 1.44 Mb Diskette (most common) Notice: This diskette is similar to the 720 Kb diskette above except for the extra hole in the upper left hand corner, indicating that it is a 1.44 Mb diskette. The write protect feature has the very same function as stated above. |