Solution

The total storage capacity of the floppy disk can be calculated by multiplying the number of tracks, the number of sectors per track, and the number of bytes per sector.

The number of tracks on the floppy disk is 80 and the number of bytes per sector is 128. Let's assume that the number of sectors per track is "S". Then, the total storage capacity of the floppy disk can be expressed as:

Total storage capacity = number of tracks x number of sectors per track x number of bytes per sector = 80 x S x 128

We know that the total storage capacity of the floppy disk is 163,840 bytes. Therefore, we can write:

80 x S x 128 = 163840

Solving for S, we get:

S = 163840 / (80 x 128) = 16

Therefore, the floppy disk has 16 sectors.

Hence, the correct answer is option 4.